This page provides current names for seaweed species whose names have changed since the publication of Marine Algae of California (Abbott & Hollenberg 1976). This list is organized by group (Chlorophyta, Phaeophyceae, Rhodophyta); within each group are genera and species in alphabetical order. A list of California seaweeds discovered or described since 1976 follows the nomenclatural/taxonomic updates.

This is a draft of an on-going project. If you have questions or comments, please contact Kathy Ann Miller, University Herbarium, University of California at Berkeley.

Green Algae

Former name: Blidingia minima var. subsalsa (Kjellman) Scagel
Current name: Blidingia subsalsa (Kjellman) Kornmann & Sahling ex Scagel et al.

Kornmann, P. & Sahling, P.H. 1978. Die Blidingia-Arten von Helgoland (Ulvales, Chlorophyta). Helgoländer Wissenschaftliche Meeresuntersuchungen 31: 391-413.

Scagel, R.F., Gabrielson, P.W., Garbary, D.J., Golden, L., Hawkes, M.W., Lindstrom, S.C., Oliveira, J.C. & Widdowson, T.B. 1989. A synopsis of the benthic marine algae of British Columbia, southeast Alaska, Washington and Oregon. Phycological Contributions, University of British Columbia 3: vi + 532.

Former name: Chlorochytrium porphyrae Setchell & Gardner
Current name: Halochlorococcum porphyrae (Setchell & Gardner) West, C.M. Smith & McBride

West, J.A., Smith, C.M. & McBride, D.L. 1988. Observations on the marine unicellular endophyte Chlorochytrium porphyrae (Chlorophyceae). Botanica Marina 31: 299-305.

Former name: Enteromorpha clathrata (Roth) Greville
Current name: Ulva clathrata (Roth) C. Agardh

Hayden, H.S., Blomster, J., Maggs, C.A., Silva, P.C., Stanhope, M.J. & Waaland, J.R. 2003. Linnaeus was right all along: Ulva and Enteromorpha are not distinct genera. European Journal of Phycology 38: 277-294.
Hayden, H.S. & Waaland, J.R. 2004. A molecular systematic study of Ulva (Ulvaceae, Ulvales) from the northeast Pacific. Phycologia 43: 364-382.

Former name: Enteromorpha clathrata var. crinita (Nees) Hauck
Current name: Ulva clathrata (Roth) C. Agardh

Hayden, H.S., Blomster, J., Maggs, C.A., Silva, P.C., Stanhope, M.J. & Waaland, J.R. 2003. Linnaeus was right all along: Ulva and Enteromorpha are not distinct genera. European Journal of Phycology 38: 277-294.
Hayden, H.S. & Waaland, J.R. 2004. A molecular systematic study of Ulva (Ulvaceae, Ulvales) from the northeast Pacific. Phycologia 43: 364-382.

Former name: Enteromorpha compressa (Linnaeus) Greville
Current name: Ulva compressa Linnaeus

Hayden, H.S., Blomster, J., Maggs, C.A., Silva, P.C., Stanhope, M.J. & Waaland, J.R. 2003. Linnaeus was right all along: Ulva and Enteromorpha are not distinct genera. European Journal of Phycology 38: 277-294.
Hayden, H.S. & Waaland, J.R. 2004. A molecular systematic study of Ulva (Ulvaceae, Ulvales) from the northeast Pacific. Phycologia 43: 364-382.

Former name: Enteromorpha flexuosa (Roth) J. Agardh
Current name: Ulva flexuosa Wulfen

Hayden, H.S., Blomster, J., Maggs, C.A., Silva, P.C., Stanhope, M.J. & Waaland, J.R. 2003. Linnaeus was right all along: Ulva and Enteromorpha are not distinct genera. European Journal of Phycology 38: 277-294.
Hayden, H.S. & Waaland, J.R. 2004. A molecular systematic study of Ulva (Ulvaceae, Ulvales) from the northeast Pacific. Phycologia 43: 364-382.

Former name: Enteromorpha intestinalis (Linnaeus) Link
Current name: Ulva intestinalis Linnaeus

Hayden, H.S., Blomster, J., Maggs, C.A., Silva, P.C., Stanhope, M.J. & Waaland, J.R. 2003. Linnaeus was right all along: Ulva and Enteromorpha are not distinct genera. European Journal of Phycology 38: 277-294.
Hayden, H.S. & Waaland, J.R. 2004. A molecular systematic study of Ulva (Ulvaceae, Ulvales) from the northeast Pacific. Phycologia 43: 364-382.

Former name: Enteromorpha linza (Linnaeus) J. Agardh
Current name: Ulva linza Linnaeus

Hayden, H.S., Blomster, J., Maggs, C.A., Silva, P.C., Stanhope, M.J. & Waaland, J.R. 2003. Linnaeus was right all along: Ulva and Enteromorpha are not distinct genera. European Journal of Phycology 38: 277-294.
Hayden, H.S. & Waaland, J.R. 2004. A molecular systematic study of Ulva (Ulvaceae, Ulvales) from the northeast Pacific. Phycologia 43: 364-382.

Former name: Enteromorpha prolifera (Müller) J. Agardh
Current name: Ulva prolifera O.F. Müller

Hayden, H.S., Blomster, J., Maggs, C.A., Silva, P.C., Stanhope, M.J. & Waaland, J.R. 2003. Linnaeus was right all along: Ulva and Enteromorpha are not distinct genera. European Journal of Phycology 38: 277-294.
Hayden, H.S. & Waaland, J.R. 2004. A molecular systematic study of Ulva (Ulvaceae, Ulvales) from the northeast Pacific. Phycologia 43: 364-382.

Former name: Halicystis ovalis (Lyngbye) Areschoug
Current name: Derbesia marina (Lyngbye) Solier

Kornmann, P. 1938. Zur Entwicklungsgeschichte von Derbesia und Halicystis. Planta 28: 464-470.

Former name: Monostroma oxyspermum (Kützing) Doty
Current name: Gayralia oxysperma (Kützing) Vinogradova ex Scagel et al.

Vinogradova, K.L. 1969. K. sistematike poryadka Ulvales (Chlorophyta) s.l.. Botanicheskij Zhurnal SSSR 54: 1347-1355.
Scagel, R.F., Gabrielson, P.W., Garbary, D.J., Golden, L., Hawkes, M.W., Lindstrom, S.C., Oliveira, J.C. & Widdowson, T.B. 1989. A synopsis of the benthic marine algae of British Columbia, southeast Alaska, Washington and Oregon. Phycological Contributions, University of British Columbia 3: vi + 532.

Former name: Monostroma zostericola Tilden
Current name: Kornmannia leptoderma (Kjellman) Bliding

Bliding, C. 1969 [1968]. A critical survey of European taxa in Ulvales, Part II. Ulva, Ulvaria, Monostroma, Kornmannia. Botaniska Notiser 121: 535-629.

Former name: Percursaria dawsonii Hollenberg & Abbott
Current name: Blidingia dawsonii (Hollenberg & Abbott) Lindstrom, Hanic & Golden

Lindstrom, S.C., Hanic, L.A. & Golden, L. 2006. Studies of the green alga Percursaria dawsonii (Blidingia dawsonii comb. nov. Kornmanniaceae, Ulvales) in British Columbia. Phycological Research 54: 40-56.

Former name: Prasinocladus ascus Proskauer
Current name: Tetraselmis ascus (Proskauer) R.E. Norris, Hori & Chihara

Norris, R.E., Hori, T. & Chihara, M. 1980. Revision of the genus Tetraselmis (Class Prasinophyceae). Botanical Magazine, Tokyo 93: 317-339.

Former name: Prasinocladus marinus (Cienkowski) Waern
Current name: Tetraselmis marina (Cienkowski) R.E. Norris, Hori & Chihara

Norris, R.E., Hori, T. & Chihara, M. 1980. Revision of the genus Tetraselmis (Class Prasinophyceae). Botanical Magazine, Tokyo 93: 317-339.

Former name: Pseudodictyon geniculatum Gardner
Current name: Acrochaete geniculata (Gardner) O'Kelly

O'Kelly, C.J. 1983. Observations on marine Chaetophoraceae (Chlorophyta). IV. The structure, reproduction, and life history of Acrochaete geniculata (Gardner) comb. nov. Phycologia 22: 13-21.

Former name: Rhizoclonium implexum (Dillwyn) Kützing
Current name: Rhizoclonium riparium var. implexum (Dillwyn) Rosenvinge

Silva, P.C., Basson, P.W. & Moe, R.L. 1996. Catalogue of the benthic marine algae of the Indian Ocean. University of California Publications in Botany 79: 1-1259.

Former name: Spongomorpha coalita (Ruprecht) Collins
Current name: Acrosiphonia coalita (Ruprecht) Scagel, Garbary, Golden & Hawkes

Scagel, R.F., Garbary, D.J., Golden, L. & Hawkes, M.W. 1986. A synopsis of the benthic marine algae of British Columbia, northern Washington and southeast Alaska. Vol. 1. Pp. 444. Vancouver: Department of Botany, University of British Columbia.
Sussmann, A.V., Mable, B.K., DeWreede, R.E. & Berbee, M.L. 1999. Identification of green algal endophytes as the alternate phase of Acrosiphonia (Codiolales, Chlorophyta) using ITS1 and ITS2 ribosomal DNA sequence data. Journal of Phycology 35: 607-614.

Former name: Spongomorpha mertensii (Ruprecht) Setchell & Gardner
Current name: Acrosiphonia mertensii (Ruprecht) Yendo

Yendo, K. 1916. Notes on algae new to Japan V. Botanical Magazine, Tokyo 30: 243-263.

Former name: Spongomorpha saxatilis (Ruprecht) Collins
Current name: Acrosiphonia saxatilis (Ruprecht) Vinogradova

Vinogradova, K.L. 1979. Opredelitel' vodoroslej dal'nevostochnykh morej SSSR. Selenye vodorosli. Pp. 148. Leningrad: Akademiya Nauk SSSR, Botanicheskij Institut im. V.L. Komarova.

Former name: Ulothrix laetevirens (Hooker) Collins
Current name: Ulothrix flacca (Dillwyn) Thuret

Lokhorst, G.M. 1978. Taxonomic studies on the marine and brackish-water species of Ulothrix (Ulotricales, Chlorophyceae) in western Europe. Blumea 24: 191-299.

Former name: Ulothrix pseudoflacca Wille
Current name: Ulothrix flacca (Dillwyn) Thuret

Lokhorst, G.M. 1978. Taxonomic studies on the marine and brackish-water species of Ulothrix (Ulotricales, Chlorophyceae) in western Europe. Blumea 24: 191-299.
Burrows, E.M. 1991. Seaweeds of the British Isles. Volume 2. Chlorophyta. pp. xi + 238, 60 figs, 9 plates. London: Natural History Museum Publications.

Former name: Ulva angusta Setchell & Gardner
Current name: Ulva californica Wille

Tanner, C.E. 1986. Investigations of the taxonomy and morphological variation of Ulva (Chlorophyta): Ulva californica Wille. Phycologia 25: 510-520.
Hayden, H.S. & Waaland, J.R. 2004. A molecular systematic study of Ulva (Ulvaceae, Ulvales) from the northeast Pacific. Phycologia 43: 364-382.

Former name: Ulva costata (Howe) Hollenberg
Current name: Ulva taeniata (Setchell) Setchell & Gardner

Hayden, H.S. & Waaland, J.R. 2004. A molecular systematic study of Ulva (Ulvaceae, Ulvales) from the northeast Pacific. Phycologia 43: 364-382.

Former name: Ulva dactylifera Setchell & Gardner
Current name: Ulva taeniata (Setchell) Setchell & Gardner

Hayden, H.S. & Waaland, J.R. 2004. A molecular systematic study of Ulva (Ulvaceae, Ulvales) from the northeast Pacific. Phycologia 43: 364-382.

Former name: Ulva lobata (Kützing) Setchell & Gardner
Current name: Ulva lobata (Kützing) Harvey

Harvey, W.H. 1855. Algae. In: The botany of the Antarctic voyage of H.M. discovery ships Erebus and Terror, in the years 1839-1843, under the command of Captain Sir James Clark Ross.... II. Flora Novae-Zelandiae. Part II. Flowerless plants. (Hooker, J.D., ed.), pp. 211-266. London: Reeve.

Brown Algae

Former name: Cylindrocarpus rugosus Okamura
Current name: Petrospongium rugosum (Okamura) Setchell & Gardner

Setchell, W.A. & Gardner, N.L. 1924. Phycological contributions, VII. University of California Publications in Botany 13: 1-13.

Former name: Desmarestia latifrons Kützing
Current name: Desmarestia latifrons (Ruprecht) Kützing

Ruprecht, F.J. 1850. Algae ochotenses. Die ersten sicheren Nachrichten Über die Tange des Ochotskischen Meeres. Pp. 243, 10 pls. St. Petersburg.
Peters, A.F., van Oppen, M.J.H., Wiencke, C., Stam, W.T. & Olsen, J.L. 1997. Phylogeny and historical ecology of the Desmarestiaceae (Phaeophyceae) support a southern hemisphere origin. Journal of Phycology 33: 294-309.

Former name: Desmarestia ligulata (Lightfoot) Lamouroux
Current name: Desmarestia herbacea (Turner) Lamouroux

Silva, P.C. 1979. The benthic algal flora of central San Francisco Bay. In: San Francisco Bay: the Urbanized Estuary. (Conomos, T.J., ed.), pp. 287-345. San Francisco: Pacific Division, American Association for the Advancement of Science.
Peters, A.F. & Müller, D.G. 1986. Life-history studies - a new approach to the taxonomy of ligulate species of Desmarestia (Phaeophyceae) from the Pacific coast of Canada. Canadian Journal of Botany 64: 2192-2196.
Chapman, A.R.O. 1971. Morphological variation and its taxonomic implications in the ligulate members of the genus Desmarestia occurring on the west coast of North America. Syesis 5: 1-20.
Gabrielson, P.W., Widdowson, T.B. & Lindstrom, S.C. 2004. Keys to the seaweeds and seagrasses of Oregon and California. Phycological Contribution 6: iv + 181.

Former name: Desmarestia ligulata (Lightfoot) Lamouroux
Current name: Desmarestia munda Setchell & Gardner

Peters, A.F. & Müller, D.G. 1986. Life-history studies - a new approach to the taxonomy of ligulate species of Desmarestia (Phaeophyceae) from the Pacific coast of Canada. Canadian Journal of Botany 64: 2192-2196.
Peters, A.F., van Oppen, M.J.H., Wiencke, C., Stam, W.T. & Olsen, J.L. 1997. Phylogeny and historical ecology of the Desmarestiaceae (Phaeophyceae) support a southern hemisphere origin. Journal of Phycology 33: 294-309.

Former name: Desmarestia ligulata var. firma (C. Agardh) J. Agardh
Current name: Desmarestia tabacoides Okamura

Peters, A.F., van Oppen, M.J.H., Wiencke, C., Stam, W.T. & Olsen, J.L. 1997. Phylogeny and historical ecology of the Desmarestiaceae (Phaeophyceae) support a southern hemisphere origin. Journal of Phycology 33: 294-309.
Gabrielson, P.W., Widdowson, T.B. & Lindstrom, S.C. 2004. Keys to the seaweeds and seagrasses of Oregon and California. Phycological Contribution 6: iv + 181.

Former name: Dictyoneuropsis reticulata (Saunders) Smith
Current name: Dictyoneurum californicum Ruprecht

Lane, C.E., Mayes, C., Druehl, L.D. & Saunders, G.W. 2006. A multi-gene molecular investigation of the kelp (Laminariales, Phaeophyceae) supports substantial taxonomic re-organization. Journal of Phycology 42: 493-512.

Former name: Dictyopteris johnstonei Gardner
Current name: Dictyopteris undulata Holmes

Silva, P.C. 1957. Notes on Pacific marine algae. Madroño 14: 41-51.
Abbott, I.A. 1972. Taxonomic and nomenclatural notes on North Pacific marine algae. Phycologia 11: 259-265.

Former name: Ectocarpus acutus Setchell & Gardner
Current name: Ectocarpus fasciculatus Harvey

Kim, H.S. & Lee, I.K. 1992. Morphotaxonomic studies on the Korean Ectocarpaceae (Phaeophyta) I. Genus Ectocarpus Lyngbye. Korean Journal of Phycology 7: 225-242.

Former name: Ectocarpus acutus var. haplogloiae Doty
Current name: Ectocarpus fasciculatus Harvey

Kim, H.S. & Lee, I.K. 1992. Morphotaxonomic studies on the Korean Ectocarpaceae (Phaeophyta) I. Genus Ectocarpus Lyngbye. Korean Journal of Phycology 7: 225-242.

Former name: Feldmannia cylindrica (Saunders) Hollenberg & Abbott
Current name: Feldmannia paradoxa var. cylindrica (Saunders) H.S. Kim & I.K. Lee

Kim, H.S. & Lee, I.K. 1994. Morphotaxonomic studies on the Korean Ectocarpaceae (Phaeophyta). III. Genus Feldmannia Hamel, specially referred to morphogenesis and phylogenetic relationship among related genera. Korean Journal of Phycology 9: 153-168.

Former name: Feldmannia globifera (Kützing) G. Hamel
Current name: Feldmannia paradoxa (Montagne) G. Hamel

Kim, H.S. & Lee, I.K. 1994. Morphotaxonomic studies on the Korean Ectocarpaceae (Phaeophyta). III. Genus Feldmannia Hamel, specially referred to morphogenesis and phylogenetic relationship among related genera. Korean Journal of Phycology 9: 153-168.

Former name: Fucus distichus Linnaeus
Current name: Fucus gardneri P.C. Silva

Silva, P.C. 1953. The identity of certain Fuci of Esper. Wasmann Journal of Biology 11: 221-232.
Silva, P.C. 1979. The benthic algal flora of central San Francisco Bay. In: San Francisco Bay: the Urbanized Estuary. (Conomos, T.J., ed.), pp. 287-345. San Francisco: Pacific Division, American Association for the Advancement of Science.

Former name: Giffordia granulosa (J.E. Smith) Hamel
Current name: Hincksia granulosa (J.E. Smith) P.C. Silva

Silva, P.C., Meñez, E.G. & Moe, R.L. 1987. Catalog of the benthic marine algae of the Philippines. Smithsonian Contributions to Marine Sciences 27: iv + 179, 2 figs, 1 table.

Former name: Giffordia hincksiae var. californica Hollenberg & Abbott
Current name: Hincksia hincksiae (Harvey) P.C. Silva

Silva, P.C., Meñez, E.G. & Moe, R.L. 1987. Catalog of the benthic marine algae of the Philippines. Smithsonian Contributions to Marine Sciences 27: iv + 179, 2 figs, 1 table.

Former name: Giffordia mitchelliae (Harvey) Hamel
Current name: Hincksia mitchelliae (Harvey) P.C. Silva

Silva, P.C., Meñez, E.G. & Moe, R.L. 1987. Catalog of the benthic marine algae of the Philippines. Smithsonian Contributions to Marine Sciences 27: iv + 179, 2 figs, 1 table.

Former name: Giffordia sandriana (Zanardini) Hamel
Current name: Hincksia sandriana (Zanardini) P.C. Silva

Silva, P.C., Meñez, E.G. & Moe, R.L. 1987. Catalog of the benthic marine algae of the Philippines. Smithsonian Contributions to Marine Sciences 27: iv + 179, 2 figs, 1 table.

Former name: Giffordia saundersii (Setchell & Gardner) Hollenberg & Abbott
Current name: Hincksia saundersii (Setchell & Gardner) P.C. Silva

Silva, P.C., Meñez, E.G. & Moe, R.L. 1987. Catalog of the benthic marine algae of the Philippines. Smithsonian Contributions to Marine Sciences 27: iv + 179, 2 figs, 1 table.

Former name: Hapterophycus canaliculatus Setchell & Gardner
Current name: Scytosiphon canaliculatus (Setchell & Gardner) Kogame

Kogame, K. 1996. Morphology and life history of Scytosiphon canaliculatus comb. nov. (Scytosiphonales, Phaeophyceae) from Japan. Phycological Research 44: 85-94.

Former name: Hedophyllum sessile (C. Agardh) Setchell
Current name: Saccharina sessilis (C. Agardh) Kuntze

Lane, C.E., Mayes, C., Druehl, L.D. & Saunders, G.W. 2006. A multi-gene molecular investigation of the kelp (Laminariales, Phaeophyceae) supports substantial taxonomic re-organization. Journal of Phycology 42: 493-512.

Former name: Hesperophycus harveyanus (Decaisne) Setchell & Gardner
Current name: Hesperophycus californicus P.C. Silva

Former name: Laminaria dentigera Kjellman (in California)
Current name: Laminaria setchellii P.C. Silva

Silva, P.C. 1957. Notes on Pacific marine algae. Madroño 14: 41-51.

Former name: Laminaria sinclairii (Harvey) Farlow, Anderson & Eaton
Current name: Laminaria sinclairii (Harvey ex J.D. Hooker & Harvey) Farlow, Anderson & Eaton

Former name: Leathesia nana Setchell & Gardner
Current name: Leathesia difformis (Linnaeus) Areschoug

Webber, E.E. 1981. Observations on Leathesia difformis (L.) Aresch. from Nahant, Massachusetts. Botanica Marina 24: 297-298.
Novaczek, I. 1987. Periodicity of epiphytes on Zostera marina in two embayments of the southern Gulf of St. Lawrence. Canadian Journal of Botany 65: 1676-1681.
Scagel, R.F., Gabrielson, P.W., Garbary, D.J., Golden, L., Hawkes, M.W., Lindstrom, S.C., Oliveira, J.C. & Widdowson, T.B. 1989. A synopsis of the benthic marine algae of British Columbia, southeast Alaska, Washington and Oregon. Phycological Contributions, University of British Columbia 3: vi + 532.

Former name: Nereocystis luetkeana (Mertens) Postels & Ruprecht
Current name: Nereocystis luetkeana (Mertens f.) Postels & Ruprecht

Former name: Pachydictyon coriaceum (Holmes) Okamura
Current name: Dictyota coriacea (Holmes) Hwang, H.S. Kim & W.J. Lee

Hwang, I.K., Kim, H.S. & Lee, W.J. 2004. Evidence for taxonomic status of Pachydictyon coriaceum (Holmes) Okamura (Dictyotales, Phaeophyceae) based on morphology and plastid protein encoding rbcL, psaA and psbA gene sequences. Algae 19: 175-190.

Former name: Pelvetia fastigiata (J. Agardh) DeToni
Current name: Silvetia compressa (J. Agardh) Serrão, Cho, Boo & Brawley

Serrão, E.A., Alice, L.A. & Brawley, S.H. 1999. Evolution of the Fucaceae (Phaeophyceae) inferred from nrDNA-ITS. Journal of Phycology 35: 382-394.

Former name: Pelvetia fastigiata f. gracilis Setchell & Gardner
Current name: Silvetia compressa subsp. deliquescens P.C. Silva

Silva, P.C., Pedroche, F.F., Chacana, M.E., Aguilar-Rosas, R., Aguilar-Rosas, L.E. & Raum, J. 2004. Geographic correlation of morphological and molecular variation in Silvetia compressa (Fucaceae, Fucales, Phaeophyceae). Phycologia 43: 204-214.
Serrão, E.A., Alice, L.A. & Brawley, S.H. 1999. Evolution of the Fucaceae (Phaeophyceae) inferred from nrDNA-ITS. Journal of Phycology 35: 382-394.

Former name: Pilayella Bory
Current name: Pylaiella Bory

Former name: Pleurophycus gardneri Setchell & Saunders
Current name: Pleurophycus gardneri Setchell & Saunders ex Tilden

Former name: Pseudolithoderma nigra Hollenberg
Current name: Pseudolithoderma nigrum Hollenberg

Former name: Rosenvingea floridana
Current name: Rosenvingea antillarum (P. Crouan & H. Crouan) Wynne

Wynne, M.J. 1997. Rosenvingea antillarum (P. Crouan & H. Crouan) comb. nov. to replace R. floridana (W.R. Taylor) W.R. Taylor (Scytosiphonales, Phaeophyta). Cryptogamie, Algologie 18: 331-336.

Former name: Scytosiphon lomentaria (Lyngbye) J. Agardh
Current name: Scytosiphon lomentaria (Lyngbye) Link

Former name: Sorocarpus pacifica Hollenberg
Current name: Botrytella pacifica (Hollenberg) Hansen

Hansen, G.I. 1997. A revised checklist and preliminary assessment of the macrobenthic marine algae and seagrasses of Oregon. In: Conservation and Management of Native Flora and Fungi. (Kaye, T.N., Liston, A., Love, R.M., Luoma, D.L., Meinke, R.J. & Wilson, M.V., eds.), pp. 175-200. Corvallis: Native Plant Society of Oregon.

Former name: Sphacelaria californica (Sauvageau) Setchell & Gardner
Current name: Sphacelaria californica Sauvageau

Former name: Sphacelaria furcigera Kützing
Current name: Sphacelaria rigidula Kützing

Prud'homme van Reine, W.F. 1982. A taxonomic revision of the European Sphacelariaceae (Sphacelariales, Phaeophyceae). Leiden Bot. Ser. V 6. Pp. 293.
Kitayama, T. 1994. A taxonomic study of the Japanese Sphacelaria (Sphacelariales, Phaeophyceae). Bulletin of the National Science Museum, Tokyo, Ser. B (Botany) 20: 37-141.

Former name: Streblonema aecidioides DeToni
Current name: Laminariocolax aecidioides (Rosenvinge) Peters

Burkhardt, E. & Peters, A.F. 1998. Molecular evidence from nrDNA its sequences that Laminariocolax (Phaeophyceae, Ectocarpales sensu lato) is a worldwide clade of closely related kelp endophytes. Journal of Phycology 34: 682-691.

Former name: Taonia lennebackeriae J. Agardh
Current name: Taonia lennebackerae J. Agardh

Red Algae

Former name: Acrochaetium barbadense (Vickers) B¿rgesen
Current name: Colaconema macounii (Collins) Gabrielson

Gabrielson, P.W., Widdowson, T.B., Lindstrom, S.C., Hawkes, M.W. & Scagel, R.F. 2000. Keys to the benthic marine algae and seagrasses of British Columbia, Southeast Alaska, Washington and Oregon. Phycological Contribution Department of Botany, University of British Columbia No. 5: iv + 189.
Garbary, D.J., Hansen, G.I. & Scagel, R.F. 1983. The marine algae of British Columbia and northern Washington: division Rhodophyta (red algae), class Florideophyceae, orders Acrochaetiales and Nemaliales. Syesis 15 (Suppl. 1): 1-102.
Harper, J.T. & Saunders, G.W. 2002a. A re-classification of the Acrochaetiales based on molecular and morphological data, and establishment of the Colaconematales, ord. nov. British Phycological Journal 37: 463-475.

Former name: Acrochaetium amphiroae (Drew) Papenfuss
Current name: Colaconema amphiroae (Drew) Gabrielson

Gabrielson, P.W., Widdowson, T.B. & Lindstrom, S.C. 2004. Keys to the seaweeds and seagrasses of Oregon and California. Phycological Contribution 6: iv + 181.
Harper, J.T. & Saunders, G.W. 2002a. A re-classification of the Acrochaetiales based on molecular and morphological data, and establishment of the Colaconematales, ord. nov. British Phycological Journal 37: 463-475.

Former name: Acrochaetium coccineum (Drew) Papenfuss
Current name: Colaconema coccineum (Drew) Gabrielson

Gabrielson, P.W., Widdowson, T.B. & Lindstrom, S.C. 2004. Keys to the seaweeds and seagrasses of Oregon and California. Phycological Contribution 6: iv + 181.
Harper, J.T. & Saunders, G.W. 2002a. A re-classification of the Acrochaetiales based on molecular and morphological data, and establishment of the Colaconematales, ord. nov. British Phycological Journal 37: 463-475.

Former name: Acrochaetium desmarestiae Kylin
Current name: Colaconema desmarestiae (Kylin) Gabrielson

Gabrielson, P.W., Widdowson, T.B. & Lindstrom, S.C. 2004. Keys to the seaweeds and seagrasses of Oregon and California. Phycological Contribution 6: iv + 181.
Harper, J.T. & Saunders, G.W. 2002a. A re-classification of the Acrochaetiales based on molecular and morphological data, and establishment of the Colaconematales, ord. nov. British Phycological Journal 37: 463-475.

Former name: Acrochaetium microscopicum (Kützing) Nägeli
Current name: Acrochaetium microscopicum (Nägeli ex Kützing) Nägeli

Former name: Acrochaetium pacificum Kylin
Current name: Colaconema pacifica (Kylin) Woelkerling

Woelkerling, W.J. 1971. Morphology and taxonomy of the Audouinella complex (Rhodophyta) in southern Australia. Australian Journal of Botany (Suppl. 1): 1-91.

Former name: Acrochaetium rhizoideum (Drew) Rao
Current name: Colaconema rhizoideum (Drew) Gabrielson

Gabrielson, P.W., Widdowson, T.B., Lindstrom, S.C., Hawkes, M.W. & Scagel, R.F. 2000. Keys to the benthic marine algae and seagrasses of British Columbia, Southeast Alaska, Washington and Oregon. Phycological Contribution Department of Botany, University of British Columbia No. 5: iv + 189.

Former name: Acrochaetium subimmersum (Setchell & Gardner) Papenfuss
Current name: Colaconema subimmersum (Setchell & Gardner) Gabrielson

Gabrielson, P.W., Widdowson, T.B. & Lindstrom, S.C. 2004. Keys to the seaweeds and seagrasses of Oregon and California. Phycological Contribution 6: iv + 181.
Harper, J.T. & Saunders, G.W. 2002a. A re-classification of the Acrochaetiales based on molecular and morphological data, and establishment of the Colaconematales, ord. nov. British Phycological Journal 37: 463-475.

Former name: Acrochaetium vagum (Drew) Jao
Current name: Acrochaetium porphyrae (Drew) Smith

Tam, C.E., Cole, K.M. & Garbary, D.J. 1987. In situ and in vitro studies on the endophytic red algae Audouinella porphyrae and A. vaga (Acrochaetiales). Canadian Journal of Botany 65: 532-538.
Gabrielson, P.W., Widdowson, T.B. & Lindstrom, S.C. 2004. Keys to the seaweeds and seagrasses of Oregon and California. Phycological Contribution 6: iv + 181.

Former name: Acrosorium uncinatum (Turner) Kylin
Current name: Acrosorium ciliolatum (Harvey) Kylin

Womersley, H.B.S. 2003. The marine benthic flora of southern Australia - Part IIID Ceramiales - Delesseriaceae, Sarcomeniaceae, Rhodomelaceae. Pp. 533. Canberra & Adelaide: Australian Biological Resources Study & State Herbarium of South Australia.

Former name: Ahnfeltia gigartinoides J. Agardh
Current name: Ahnfeltiopsis gigartinoides (J. Agardh) P.C. Silva & DeCew

Silva, P.C. & DeCew, T.C. 1992. Ahnfeltiopsis, a new genus in the Phyllophoraceae (Gigartinales, Rhodophyceae). Phycologia 31: 576-580.

Former name: Ahnfeltia plicata (Hudson) Fries
Current name: Ahnfeltia fastigiata (Endlicher) Makienko

Makienko, V.F. 1970. K sistematike vidov Ahnfeltia Fries iz dal'nevostochnykh morej SSSR. Botanicheskij Zhurnal SSSR 55: 1077-1087.

Former name: Amphiroa zonata Yendo
Current name: Amphiroa beauvoisii Lamouroux

Norris, J.N. & Johansen, H.W. 1981. Articulated coralline algae of the Gulf of California, Mexico, I: Amphiroa Lamouroux. Smithsonian Contributions to the Marine Sciences 9: 1-29.

Former name: Anisocladella pacifica Kylin
Current name: Erythroglossum californicum (J. Agardh) J. Agardh

Silva, P.C. 1979. The benthic algal flora of central San Francisco Bay. In: San Francisco Bay: the Urbanized Estuary. (Conomos, T.J., ed.), pp. 287-345. San Francisco: Pacific Division, American Association for the Advancement of Science.

Former name: Antithamnion hubbsii Dawson
Current name: Antithamnion nipponicum Yamada & Inagaki

Cho, T.O., Won, B.Y. & Fredericq, S. 2006. Antithamnion nipponicum (Ceramiaceae, Rhodophyta), incorrectly known as A. pectinatum in western Europe, is a recent introduction along the North Carolina and Pacific coasts of North America. European Journal of Phycology 40: 323-335.

Former name: Antithamnionella breviramosa (Dawson) Womersley & Bailey
Current name: Antithamnionella elegans (Berthold) Price & John

Stewart, J.G. 1991. Marine algae and seagrasses of San Diego County. California Sea Grant College, University of California, La Jolla, Calif. Report No. T-CSGCP-020. Pp. 197.
Cormaci, M. & Furnari, G. 1988. Antithamnionella elegans (Berthold) Cormaci et Furnari (Ceramiaceae, Rhodophyta) and related species, with the description of two new varieties. Phycologia 27: 340-346.
Prud'homme van Reine, W.F. 1982. A taxonomic revision of the European Sphacelariaceae (Sphacelariales, Phaeophyceae). Leiden Bot. Ser. V 6. Pp. 293.

Former name: Antithamnionella glandulifera (Kylin) Wollaston
Current name: Antithamnionella spirographidis (Schiffner) Wollaston

Wollaston, E.M. 1968. Morphology and taxonomy of Southern Australian genera of Crouanieae Schmitz (Ceramiaceae, Rhodophyta). Australian Journal of Botany 16: 217-417.
Gabrielson, P.W., Widdowson, T.B. & Lindstrom, S.C. 2004. Keys to the seaweeds and seagrasses of Oregon and California. Phycological Contribution 6: iv + 181.

Former name: Antithamnionella pacifica var. uncinata (Gardner) Wollaston
Current name: Antithamnionella pacifica (Harvey) Wollaston

Gabrielson, P.W., Widdowson, T.B. & Lindstrom, S.C. 2004. Keys to the seaweeds and seagrasses of Oregon and California. Phycological Contribution 6: iv + 181.

Former name: Asterocytis ramosa (Thwaites) Gobi ex F. Schmitz
Current name: Chroodactylon ornatum (C. Agardh) Basson

Basson, P.W. 1979. Marine algae of the Arabian Gulf coast of Saudi Arabia (second half). Botanica Marina 22: 65-82.

Former name: Bangia fuscopurpurea (Dillwyn) Lyngbye
Current name: Bangia spp.

Gabrielson, P.W., Widdowson, T.B. & Lindstrom, S.C. 2004. Keys to the seaweeds and seagrasses of Oregon and California. Phycological Contribution 6: iv + 181.

Former name: Bonnemaisonia nootkana (Esper) P.C. Silva
Current name: Bonnemaisonia californica Buffham

Silva, P.C., Basson, P.W. & Moe, R.L. 1996. Catalogue of the benthic marine algae of the Indian Ocean. University of California Publications in Botany 79: 1-1259.
Buffham, T.H. 1896. On Bonnemaisonia hamifera, Hariot, in Cornwall. Journal of the Quekett Microscopical Club Ser. 2(6): 177-182.

Former name: Bossiella californica ssp. schmittii (Manza) Johansen
Current name: Bossiella schmittii (Manza) Johansen

Johansen, H.W. 1971. Changes and additions to the articulated coralline flora of California. Phycologia 10: 241-249.

Former name: Bossiella orbigniana ssp. dichotoma (Manza) Johansen
Current name: Bossiella dichotoma (Manza) P.C. Silva

Silva, P.C. 1957. Notes on Pacific marine algae. Madroño 14: 41-51.

Former name: Botryocladia hancockii Dawson
Current name: Irvinea hancockii (Dawson) Wilkes, McIvor & Guiry

Wilkes, R.J., McIvor, L. & Guiry, M.D. 2006. Vegetative morphology and rbcL phylogeny of some members of the genera Botryocladia and Irvinea (Rhodymeniaceae, Rhodophyta). Phycologia 45: 481-494.

Former name: Botryoglossum farlowianum (J. Agardh) DeToni
Current name: Cryptopleura ruprechtiana (J. Agardh) Kylin

Hawkes, M.W., Tanner, C.E. & Lebednik, P.A. 1978. The benthic marine algae of northern British Columbia. Syesis 11: 81-115.
Ver Steeg, J. & Josselyn, M.N. 1983. Taxonomic and morphological studies of Cryptopleura (Rhodophyta, Delesseriaceae). Wasmann J. Biol. 41: 97-107.
Wynne, M.J. 1987. Records and notes on Alaskan marine algae. II. Contributions from the University of Michigan Herbarium 16: 223-232.
Hansen, G.I. 1997. A revised checklist and preliminary assessment of the macrobenthic marine algae and seagrasses of Oregon. In: Conservation and Management of Native Flora and Fungi. (Kaye, T.N., Liston, A., Love, R.M., Luoma, D.L., Meinke, R.J. & Wilson, M.V., eds.), pp. 175-200. Corvallis: Native Plant Society of Oregon.

Former name: Botryoglossum farlowianum var. anomalum Hollenberg & Abbott
Current name: Cryptopleura ruprechtiana (J. Agardh) Kylin

Former name: Botryoglossum ruprechtianum (J. Agardh) DeToni
Current name: Cryptopleura ruprechtiana (J. Agardh) Kylin

Kylin, H. 1924. Studien über die Delesseriaceen. Acta Universitatis Lundensis 20(6): 1-111.

Former name: Branchioglossum woodii (J. Agardh) Kylin
Current name: Branchioglossum bipinnatifidum (Montagne) Wynne

Wynne, M.J. 1983. The current status of genera in the Delesseriaceae (Rhodophyta). Botanica Marina 26: 437-450.

Former name: Callithamnion rupicolum Anderson
Current name: Callithamnion rupicola Anderson

Former name: Callophyllis firma (Kylin) R.E. Norris
Current name: Pugetia firma Kylin

Harper, J.T., & Saunders, G.W. 2002b. Using molecular data to resolve the taxonomic limits of the genera Callophyllis, Euthora and Pugetia (Kallymeniaceae, Rhodophyta). Phycological Research 50: 275-282.

Former name: Ceramium eatonianum (Farlow) DeToni
Current name: Corallophila eatoniana (Farlow) T.O. Cho, Choi, Hansen & Boo

Cho, T.O., Choi, H.G., Hansen, G. & Boo, S.M. 2000. Corallophila eatoniana comb. nov. (Ceramiaceae, Rhodophyta) from the Pacific coast of North America. Phycologia 39: 323-331.

Former name: Ceramium gracillimum var. byssoideum (Harvey) Mazoyer
Current name: Ceramium flaccidum (Kützing) Ardissone

Stewart. J.G. 1989. Notes on marine algae of San Diego County including merger of Murrayellopsis with Veleroa. Bulletin of the Southern California Academy of Science 88:103-116.

Former name: Ceramium taylorii Dawson
Current name: Ceramium flaccidum (Kützing) Ardissone

Stewart. J.G. 1989. Notes on marine algae of San Diego County including merger of Murrayellopsis with Veleroa. Bulletin of the Southern California Academy of Science 88:103-116.

Former name: Chondria californica (Collins) Kylin
Current name: Chondria acrorhizophora Setchell & Gardner

Silva, P.C. 1991. Notes on the type of specimens of red algal parasites described from California by W.A. Setchell. Taxon 40: 463-470.

Former name: Choreocolax polysiphoniae Reinsch
Current name: Leachiella pacifica Kugrens

Kugrens, P. 1982. Leachiella pacifica, gen. et sp. nov., a new parasitic red alga from Washington and California. American Journal of Botany 69: 306-319.

Former name: Coeloseira compressa Hollenberg
Current name: Gastroclonium compressum (Hollenberg) Chang & Xi

Chang, C.F. & Xia, B.M. 1978. A new species of Gastroclonium from the Xisha Islands, Guangdong Province, China. Oceanol. Limnol. Sin. 9: 209-214.

Former name: Coeloseira parva Hollenberg
Current name: Gastroclonium parvum (Hollenberg) Chang & Xi

Chang, C.F. & Xia, B.M. 1978. A new species of Gastroclonium from the Xisha Islands, Guangdong Province, China. Oceanol. Limnol. Sin. 9: 209-214.

Former name: Corallina officinalis var. chilensis (Decaisne) Kützing
Current name: Corallina chilensis Decaisne
P.C. Silva, personal communication

Former name: Cruoria profunda Dawson
Current name: Opuntiella californica (Farlow) Kylin

DeCew, T.C., West, J.A. & Silva, P.C. 1992. The life history and anatomy of Opuntiella californica (Gigartinales, Rhodophyceae). Phycologia 31: 462-469.

Former name: Cruoriopsis aestuarii Hollenberg
Current name: Gloiosiphonia californica (Farlow) J. Agardh

DeCew, T.C., West, J.A. & Ganesan, E.K. 1981. The life history and developmental morphology of two species of Gloiosiphonia (Rhodophyta: Cryptonemiales, Gloiosiphoniaceae) from the Pacific coast of North America. Phycologia 20: 415-423.

Former name: Cryptonemia ovalifolia Kylin
Current name: Isabbottia ovalifolia (Kylin) Balakrishnan

Balakrishnan, M.S. 1980. Taxonomic studies on U.S. Pacific Cryptonemiaceae I. Two new genera: Isabbottia and Norrissia. In: Taxonomy of algae (Desikachary, T.V. & Rao, V.N., eds.), pp. 273-286. University of Madras.

Former name: Cryptopleura corallinara (Nott) Gardner
Current name: Cryptopleura peltata (Montagne) Wynne

Wynne, M.J. 2001. The identity of Aspidophora Montagne (Delesseriaceae, Rhodophyta). Cryptogamie, Algologie 22: 285-295.

Former name: Endocladia muricata (Postels & Ruprecht) J. Agardh
Current name: Endocladia muricata (Endlicher) J. Agardh

Former name: Erythrocladia subintegra Rosenvinge
Current name: Sahlingia subintegra (Rosenvinge) Kornmann

Kornmann, P. 1989. Sahlingia nov. gen. based on Erythrocladia subintegra (Erythropeltidales, Rhodophyta). British Phycological Journal 24: 223-228.

Former name: Erythrotrichia parksii Gardner
Current name: Erythrotrichia carnea (Dillwyn) J. Agardh

Desikachary, T.V., Krishnamurthy, V. & Balakrishnan, M.S. 1990. Rhodophyta. II. Taxonomy part. Part IIA. Pp. vi + 279, 51 figs, XLII plates. Madras, India: Madras Science Foundation.

Former name: Erythrotrichia porphyroides Gardner
Current name: Porphyrostromium boryanum (Montagne) P.C. Silva

Silva, P.C., Basson, P.W. & Moe, R.L. 1996. Catalogue of the benthic marine algae of the Indian Ocean. University of California Publications in Botany 79: 1-1259.

Former name: Erythrotrichia pulvinata Gardner
Current name: Erythrotrichia carnea (Dillwyn) J. Agardh

Brodie, J. & Irvine, L.M. 2003. Seaweeds of the British Isles. Volume 1. Rhodophyta. Part 3B. Bangiophycidae. Pp. xiii + 167 + map. Andover: Intercept.

Former name: Erythrotrichia tetraseriata Gardner
Current name: Erythrotrichia carnea (Dillwyn) J. Agardh

Desikachary, T.V., Krishnamurthy, V. & Balakrishnan, M.S. 1990. Rhodophyta. II. Taxonomy part. Part IIA. Pp. vi + 279, 51 figs, XLII plates. Madras, India: Madras Science Foundation.

Former name: Farlowia compressa J. Agardh
Current name: retained rather than merged with F. mollis

Gabrielson, P.W., Widdowson, T.B. & Lindstrom, S.C. 2004. Keys to the seaweeds and seagrasses of Oregon and California. Phycological Contribution 6: iv + 181.

Former name: Fauchea fryeana Setchell
Current name: Gloiocladia fryeana (Setchell) Sánchez & Rodríguez-Prieto

Rodríguez-Prieto, C., Freshwater, D.W., & Sánchez, N. 2007. Vegetative and reproductive morphology of Gloiocladia repens (C. Agardh) Sánchez & Rodríguez-Prieto comb. nov. (Rhodymeniales, Rhodophyta), with a taxonomic re-assessment of the genera Fauchea and Gloiocladia. European Journal of Phycology 42: 145-162.

Former name: Fauchea galapagensis Taylor
Current name: Gloiocladia galapagensis (Taylor) Sánchez & Rodríguez-Prieto

Rodríguez-Prieto, C., Freshwater, D.W., & Sánchez, N. 2007. Vegetative and reproductive morphology of Gloiocladia repens (C. Agardh) Sánchez & Rodríguez-Prieto comb. nov. (Rhodymeniales, Rhodophyta), with a taxonomic re-assessment of the genera Fauchea and Gloiocladia. European Journal of Phycology 42: 145-162.

Former name: Fauchea laciniata J. Agardh
Current name: Gloiocladia laciniata (J. Agardh) Sánchez & Rodríguez-Prieto

Rodríguez-Prieto, C., Freshwater, D.W., & Sánchez, N. 2007. Vegetative and reproductive morphology of Gloiocladia repens (C. Agardh) Sánchez & Rodríguez-Prieto comb. nov. (Rhodymeniales, Rhodophyta), with a taxonomic re-assessment of the genera Fauchea and Gloiocladia. European Journal of Phycology 42: 145-162.

Former name: Gastroclonium coulteri (Harvey) Kylin
Current name: Gastroclonium subarticulatum (Turner) Kützing

Scagel, R.F., Gabrielson, P.W., Garbary, D.J., Golden, L., Hawkes, M.W., Lindstrom, S.C., Oliveira, J.C. & Widdowson, T.B. 1989. A synopsis of the benthic marine algae of British Columbia, southeast Alaska, Washington and Oregon. Phycological Contributions, University of British Columbia 3: vi + 532.

Former name: Gigartina agardhii Setchell & Gardner
Current name: Mastocarpus jardinii (J. Agardh) West

Guiry, M.D., West, J.A., Kim, D.H. & Masuda, M. 1984. Reinstatement of the genus Mastocarpus Kützing (Rhodophyta). Taxon 33: 53-63.

Former name: Gigartina canaliculata Harvey
Current name: Chondracanthus canaliculatus (Harvey) Guiry

Hommersand, M.H., Guiry, M.D., Fredericq, S. & Leister, G.L. 1993. New perspectives in the taxonomy of the Gigartinaceae (Gigartinales, Rhodophyta). Proceedings of the International Seaweed Symposium: 105-120.

Former name: Gigartina corymbifera (Kützing) J. Agardh
Current name: Chondracanthus corymbiferus (Kützing) Guiry

Hommersand, M.H., Guiry, M.D., Fredericq, S. & Leister, G.L. 1993. New perspectives in the taxonomy of the Gigartinaceae (Gigartinales, Rhodophyta). Proceedings of the International Seaweed Symposium: 105-120.

Former name: Gigartina exasperata Harvey & Bailey
Current name: Chondracanthus exasperatus (Harvey & Bailey) Hughey

Hughey, J.R. Dudash, R. & Kjeldsen, C.K. 1996. A field and molecular systematic study on species of Chondracanthus (Gigartinales, Rhodophyceae) from Pacific North America. Journal of Phycology 32: 22-23.

Former name: Gigartina harveyana (Kützing) Setchell & Gardner
Current name: Chondracanthus harveyanus (Kützing) Guiry

Hommersand, M.H., Guiry, M.D., Fredericq, S. & Leister, G.L. 1993. New perspectives in the taxonomy of the Gigartinaceae (Gigartinales, Rhodophyta). Proceedings of the International Seaweed Symposium: 105-120.

Former name: Gigartina leptorhynchos J. Agardh
Current name: Mazzaella leptorhynchos (J. Agardh) Leister

Hommersand, M.H., Guiry, M.D., Fredericq, S. & Leister, G.L. 1993. New perspectives in the taxonomy of the Gigartinaceae (Gigartinales, Rhodophyta). Proceedings of the International Seaweed Symposium: 105-120.

Former name: Gigartina papillata (C. Agardh) J. Agardh
Current name: Mastocarpus papillatus (C. Agardh) Kützing

Guiry, M.D., West, J.A., Kim, D.H. & Masuda, M. 1984. Reinstatement of the genus Mastocarpus Kützing (Rhodophyta). Taxon 33: 53-63.

Former name: Gigartina spinosa (Kützing) Harvey
Current name: Chondracanthus spinosus (Kützing) Guiry

Hommersand, M.H., Guiry, M.D., Fredericq, S. & Leister, G.L. 1993. New perspectives in the taxonomy of the Gigartinaceae (Gigartinales, Rhodophyta). Proceedings of the International Seaweed Symposium: 105-120.

Former name: Gigartina tepida Hollenberg
Current name: Chondracanthus tepidus (Hollenberg) Guiry

Hommersand, M.H., Guiry, M.D., Fredericq, S. & Leister, G.L. 1993. New perspectives in the taxonomy of the Gigartinaceae (Gigartinales, Rhodophyta). Proceedings of the International Seaweed Symposium: 105-120.

Former name: Gigartina volans (C. Agardh) J. Agardh
Current name: Mazzaella volans (C. Agardh) Fredericq

Hommersand, M.H., Guiry, M.D., Fredericq, S. & Leister, G.L. 1993. New perspectives in the taxonomy of the Gigartinaceae (Gigartinales, Rhodophyta). Proceedings of the International Seaweed Symposium: 105-120.

Former name: Gloiosiphonia capillaris (Hudson) Berkeley
Current name: Gloiosiphonia californica (Farlow) J. Agardh

DeCew, T.C., West, J.A. & Ganesan, E.K. 1981. The life history and developmental morphology of two species of Gloiosiphonia (Rhodophyta: Cryptonemiales, Gloiosiphoniaceae) from the Pacific coast of North America. Phycologia 20: 415-423.

Former name: Goniotrichum alsidii (Zanardini) Howe
Current name: Stylonema alsidii (Zanardini) Drew

Drew, K.M. 1956. Conferva ceramicola Lyngbye. Botanisk Tidsskrift 53: 67-74.

Former name: Goniotrichum cornu-cervi (Reinsch) Hauck
Current name: Stylonema cornu-cervi Reinsch

Brodie, J. & Irvine, L.M. 2003. Seaweeds of the British Isles. Volume 1. Rhodophyta. Part 3B. Bangiophycidae. Pp. xiii + 167 + map. Andover: Intercept.

Former name: Gracilaria andersonii (Grunow) Kylin
Current name: Gracilaria papenfussii Abbott

Abbott, I.A. 1983. Some species of Gracilaria from California. Taxon 32(4): 561-564.

Former name: Gracilaria sjoestedtii (Kylin) Farlow
Current name: Gracilariopsis andersonii (Grunow) Dawson

Abbott, I.A. 1983. Some species of Gracilaria from California. Taxon 32(4): 561-564.
Gurgel, C.F., L.M. Liao, S. Fredericq, & M.H. Hommersand. 2003. Systematics of Gracilariopsis (Gracilariales, Rhodophyta) based on rbcL sequence analyses and morphological evidence. Journal of Phycology 39:154-171.

Former name: Gracilaria veleroae Dawson
Current name: Gracilaria mammillaris (Montagne) Howe

Abbott, I.A. 1995. A decade of species of Gracilaria (sensu lato). In: Taxonomy of Economic Seaweeds. (Abbott, I.A., ed.) Vol. 5, pp. 185-195. La Jolla, California: California Sea Grant College System.

Former name: Gracilaria verrucosa (Hudson) Papenfuss
Current name: Gracilaria pacifica Abbott

Abbott, I.A. 1985. New species of Gracilaria Grev. (Gracilariaceae, Rhodophyta) from California and Hawaii. In Taxonomy of Economic Seaweeds with reference to some Pacific and Caribbean species (Abbott, I.A. & Norris, J.N., eds.), California Sea Grant College Program, pp. 115-121.

Former name: Grateloupia doryphora (Montagne) Howe
Current name: Grateloupia californica Kylin

Gavio, B. & Fredericq, S. 2002. Grateloupia turuturu (Halymeniaceae, Rhodophyta) is the correct name of the non-native species in the Atlantic known as Grateloupia doryphora. European Journal of Phycology 37: 349-360.

Former name: Grateloupia setchellii Kylin
Current name: Norrissia setchellii (Kylin) Balakrishnan

Balakrishnan, M.S. 1980. Taxonomic studies on U.S. Pacific Cryptonemiaceae I. Two new genera: Isabbottia and Norrissia. In: Taxonomy of algae (Desikachary, T.V. & Rao, V.N., eds.), pp. 273-286. University of Madras.

Former name: Griffithsia furcellata J. Agardh
Current name: Anotrichium furcellatum (J. Agardh) Baldock

Baldock, R.N. 1976. The Griffithsieae group of the Ceramiaceae (Rhodophyta) and its southern Australian representatives. Australian Journal of Botany 24: 509-593.

Former name: Gymnogongrus leptophyllus J. Agardh
Current name: Ahnfeltiopsis leptophylla (J. Agardh) P.C. Silva & DeCew

Silva, P.C. & DeCew, T.C. 1992. Ahnfeltiopsis, a new genus in the Phyllophoraceae (Gigartinales, Rhodophyceae). Phycologia 31: 576-580.

Former name: Gymnogongrus linearis (C. Agardh) J. Agardh
Current name: Ahnfeltiopsis linearis (C. Agardh) P.C. Silva & DeCew

Silva, P.C. & DeCew, T.C. 1992. Ahnfeltiopsis, a new genus in the Phyllophoraceae (Gigartinales, Rhodophyceae). Phycologia 31: 576-580.

Former name: Gymnogongrus platyphyllus Gardner
Current name: Gymnogongrus chiton (Howe) P.C. Silva & DeCew

Silva, P.C. 1979. The benthic algal flora of central San Francisco Bay. In: San Francisco Bay: the Urbanized Estuary. (Conomos, T.J., ed.), pp. 287-345. San Francisco: Pacific Division, American Association for the Advancement of Science.

Former name: Gymnothamnion elegans (C. Agardh) J. Agardh
Current name: Gymnothamnion elegans (Schousboe ex C. Agardh) J. Agardh

Former name: Haematocelis rubens J. Agardh
Current name: Schizymenia pacifica (Kylin) Kylin

DeCew, T.C., Silva, P.C. & West, J.A. 1992. Culture studies on the relationship between Schizymenia and Haematocelis (Gigartinales, Rhodophyceae) from the Pacific coast of North America. Journal of Phycology 28: 558-566.

Former name: Haliptylon gracile (Lamouroux) Johansen
Current name: Haliptilon roseum (Lamarck) Garbary & Johansen

Johansen, H.W. & Womersley, H.B.S. 1986. Haliptilon roseum (Corallinaceae, Rhodophyta) in southern Australia. Australian Journal of Botany 34: 551-567.
Silva, P.C. & Chacana, M.E. 2005. Marine algae from Islas San Félix y San Ambrosio (Chilean Oceanic Islands). Cryptogamie Algologie 26: 103-118.

Former name: Halymenia coccinea (Harvey) Abbott
Current name: Weeksia coccinea (Harvey) Lindstrom

Lindstrom, S.C. 1986. Nomenclatural and taxonomic notes on species of the red algal genera Halymenia (Cryptonemiaceae) and Weeksia (Dumontiaceae). Taxon 35: 531-533.

Former name: Herposiphonia plumula (J. Agardh) Hollenberg
Current name: Herposiphonia plumula (J. Agardh) Falkenberg

Former name: Herposiphonia tenella f. secunda (C. Agardh) Hollenberg
Current name: Herposiphonia secunda (C. Agardh) Ambronn

Silva, P.C., Basson, P.W. & Moe, R.L. 1996. Catalogue of the benthic marine algae of the Indian Ocean. University of California Publications in Botany 79: 1-1259.

Former name: Heteroderma nicholsii Setchell & Mason
Current name: Pneophyllum nicholsii (Setchell & Mason) P.C. Silva & Gabrielson

Gabrielson, P.W., Widdowson, T.B. & Lindstrom, S.C. 2004. Keys to the seaweeds and seagrasses of Oregon and California. Phycological Contribution 6: iv + 181.
Chamberlain, Y.M. 1983. Studies in the Corallinaceae with special reference to Fosliella and Pneophyllum in the British Isles. Bulletin of the British Museum (Natural History) Botany 11: 291-463.

Former name: Heterosiphonia japonica Yendo
Current name: Heterosiphonia densiuscula Kylin

Kylin, H. 1925. The marine red algae in the vicinity of the Biological Station at Friday Harbor, Wash. Acta Universitatis Lundensis 21(9): 1-87.
Gabrielson, P.W., Widdowson, T.B. & Lindstrom, S.C. 2004. Keys to the seaweeds and seagrasses of Oregon and California. Phycological Contribution 6: iv + 181.

Former name: Hildenbrandia prototypus Nardo
Current name: Hildenbrandia rubra (Sommerfelt) Meneghini

Meneghini, G. 1841. Memoria diretta a mostrare i rapporti di organizzazione fra le Alghe propriamente dette o Ficee, e le Alghe terrestri o Licheni, pp. 417--431. In: Atti della Terza Riunione degli Scienziati Italiani ... Firenze ... 1841. Firenze.
Denizot, M. 1968. Les Algues Floridées encroutantes (à l'exclusion des Corallinacées). Paris: published by author. Pp. 310, 227 figs.
Silva, P.C., Basson, P.W. & Moe, R.L. 1996. Catalogue of the benthic marine algae of the Indian Ocean. University of California Publications in Botany 79: 1-1259.

Former name: Holmesia californica (Dawson) Dawson
Current name: Loranthophycus californicus Dawson

Dawson, E.Y. 1944. A new parasitic red alga from southern California. Bulletin of the Torrey Botanical Club 71: 655-657.
Dawson, E.Y. 1945. Notes on Pacific coast marine algae. III. Madroño 8: 93-97.

Former name: Hydrolithon decipiens (Foslie) Adey
Current name: Pseudolithophyllum decipiens (Foslie) Steneck & Paine

Steneck, R.S. & Paine, R.T. 1986. Ecological and taxonomic studies of shallow-water encrusting Corallinaceae (Rhodophyta) of the boreal northeastern Pacific. Phycologia 25: 221-240.

Former name: Hymenena smithii Kylin
Current name: Hymenena setchelli Gardner

Gabrielson, P.W., Widdowson, T.B. & Lindstrom, S.C. 2004. Keys to the seaweeds and seagrasses of Oregon and California. Phycological Contribution 6: iv + 181.

Former name: Iridaea cordata var. cordata (Turner) Bory
Current name: Mazzaella splendens (Setchell & Gardner) Fredericq

Hommersand, M.H., Fredericq, S. & Freshwater, D.W. 1994. Phylogenetic systematics and biogeography of the Gigartinaceae (Gigartinales, Rhodophyta) based on sequence analysis of rbcL. Botanica Marina 37: 193-203.

Former name: Iridaea cordata var. splendens (Setchell & Gardner) Abbott
Current name: Mazzaella splendens (Setchell & Gardner) Fredericq

Hommersand, M.H., Guiry, M.D., Fredericq, S. & Leister, G.L. 1993. New perspectives in the taxonomy of the Gigartinaceae (Gigartinales, Rhodophyta). Proceedings of the International Seaweed Symposium: 105-120.

Former name: Iridaea cornucopiae Postels & Ruprecht
Current name: Mazzaella parksii (Setchell & Gardner) Hughey, P.C. Silva & Hommersand

Hughey, J.R., Silva, P.C. & Hommersand, M.H. 2001. Solving taxonomic and nomenclatural problems in Pacific Gigartinaceae (Rhodophyta) using DNA from type material. Journal of Phycology 37: 1091-1109.

Former name: Iridaea flaccida (Setchell & Gardner) P.C. Silva
Current name: Mazzaella flaccida (Setchell & Gardner) Fredericq

Hommersand, M.H., Guiry, M.D., Fredericq, S. & Leister, G.L. 1993. New perspectives in the taxonomy of the Gigartinaceae (Gigartinales, Rhodophyta). Proceedings of the International Seaweed Symposium: 105-120.

Former name: Iridaea heterocarpa Postels & Ruprecht
Current name: Mazzaella oregona (Doty) Hughey, P.C. Silva & Hommersand

Hughey, J.R., Silva, P.C. & Hommersand, M.H. 2001. Solving taxonomic and nomenclatural problems in Pacific Gigartinaceae (Rhodophyta) using DNA from type material. Journal of Phycology 37: 1091-1109.

Former name: Iridaea lineare (Setchell & Gardner) Kylin
Current name: Mazzaella linearis (Setchell & Gardner) Fredericq

Hommersand, M.H., Guiry, M.D., Fredericq, S. & Leister, G.L. 1993. New perspectives in the taxonomy of the Gigartinaceae (Gigartinales, Rhodophyta). Proceedings of the International Seaweed Symposium: 105-120.

Former name: Iridaea punicea Postels & Ruprecht
Current name: Mazzaella sanguinea (Setchell & Gardner) Hommersand

Hommersand, M.H., Fredericq, S. & Freshwater, D.W. 1994. Phylogenetic systematics and biogeography of the Gigartinaceae (Gigartinales, Rhodophyta) based on sequence analysis of rbcL. Botanica Marina 37: 193-203.

Former name: Jania crassa Lamouroux
Current name: Jania verrucosa Lamouroux

Womersley, H.B.S. & Johansen, H.W. 1996. Subfamily Corallinoidea (Areschoug) Foslie 1908: 19. In: The marine benthic flora of southern Australia - Part IIIB - Gracilariales, Rhodymeniales, Corallinales and Bonnemaisoniales. (Womersley, H.B.S., ed.), pp. 288-317. Adelaide & Canberra: Australian Biological Resources Study & the State Herbarium of South Australia.

Former name: Jantinella verrucaeformis (Setchell & McFadden) Kylin
Current name: Jantinella verruciformis (Setchell & McFadden) Kylin

Former name: Kallymenia oblongifructa Setchell
Current name: Kallymeniopsis oblongifructa (Setchell) Hansen

Hansen, G.I. 1997. A revised checklist and preliminary assessment of the macrobenthic marine algae and seagrasses of Oregon. In: Conservation and Management of Native Flora and Fungi. (Kaye, T.N., Liston, A., Love, R.M., Luoma, D.L., Meinke, R.J. & Wilson, M.V., eds.), pp. 175-200. Corvallis: Native Plant Society of Oregon.

Former name: Kylinia rosulata Rosenvinge
Current name: Acrochaetium rosulatum (Rosenvinge) Papenfuss

Papenfuss, G.F. 1945. Review of the Acrochaetium-Rhodochorton complex of the red algae. University of California Publications in Botany 18: 229-334.
Nielsen, R., Kristiansen, A., Mathiesen, L. & Mathiesen, H. 1995. Distributional index of the benthic marine macroalgae of the Baltic Sea area. Acta Botanica Fennica 155: 1-70.

Former name: Laurencia blinksii Hollenberg & Abbott
Current name: Osmundea blinksii (Hollenberg & Abbott) Nam

Nam, K.W., Maggs, C.A. & Garbary, D.J. 1994. Resurrection of the genus Osmundea with an emendation of the generic delineation of Laurencia (Ceramiales, Rhodophyta). Phycologia 33: 384-395.

Former name: Laurencia crispa Hollenberg
Current name: Osmundea crispa (Hollenberg) Nam

Nam, K.W., Maggs, C.A. & Garbary, D.J. 1994. Resurrection of the genus Osmundea with an emendation of the generic delineation of Laurencia (Ceramiales, Rhodophyta). Phycologia 33: 384-395.

Former name: Laurencia sinicola Setchell & Gardner
Current name: Osmundea sinicola (Setchell & Gardner) Nam

Nam, K.W., Maggs, C.A. & Garbary, D.J. 1994. Resurrection of the genus Osmundea with an emendation of the generic delineation of Laurencia (Ceramiales, Rhodophyta). Phycologia 33: 384-395.

Former name: Laurencia snyderiae Dawson
Current name: Laurencia snyderae Dawson

Former name: Laurencia spectabilis var. spectabilis Postels & Ruprecht
Current name: Osmundea spectabilis var. spectabilis (Postels & Ruprecht) Nam

Nam, K.W., Maggs, C.A. & Garbary, D.J. 1994. Resurrection of the genus Osmundea with an emendation of the generic delineation of Laurencia (Ceramiales, Rhodophyta). Phycologia 33: 384-395.

Former name: Laurencia spectabilis var. diegoensis (Dawson) Dawson
Current name: Osmundea spectabilis var. diegoensis (Dawson) Nam

Nam, K.W., Maggs, C.A. & Garbary, D.J. 1994. Resurrection of the genus Osmundea with an emendation of the generic delineation of Laurencia (Ceramiales, Rhodophyta). Phycologia 33: 384-395.

Former name: Laurencia splendens Hollenberg
Current name: Osmundea splendens (Hollenberg) Nam

Nam, K.W., Maggs, C.A. & Garbary, D.J. 1994. Resurrection of the genus Osmundea with an emendation of the generic delineation of Laurencia (Ceramiales, Rhodophyta). Phycologia 33: 384-395.

Former name: Lithophyllum lichenare Mason
Current name: Pseudolithophyllum muricatum (Foslie) Steneck & Paine

Steneck, R.S. & Paine, R.T. 1986. Ecological and taxonomic studies of shallow-water encrusting Corallinaceae (Rhodophyta) of the boreal northeastern Pacific. Phycologia 25: 221-240.

Former name: Lithothamnium Philippi
Current name: Lithothamnion Philippi

Former name: Lithothamnium aculeiferum Mason
Current name: Mesophyllum crassiusculum (Foslie) Lebednik

Athanasiadis, A., Lebednik, P. & Adey, W.H. 2004. The genus Mesophyllum (Melobesioideae, Corallinales, Rhodophyta) on the northern Pacific coast of North America. Phycologia 43: 126-165.

Former name: Lithothamnium crassiusculum (Foslie) Mason
Current name: Mesophyllum crassiusculum (Foslie) Lebednik

Athanasiadis, A., Lebednik, P. & Adey, W.H. 2004. The genus Mesophyllum (Melobesioideae, Corallinales, Rhodophyta) on the northern Pacific coast of North America. Phycologia 43: 126-165.

Former name: Lithothamnium microsporum (Foslie) Foslie
Current name: Leptophytum microsporum (Foslie) Athanasiadis & Adey

Athanasiadis, A. & Adey, W.H. 2006. The genus Leptophytum (Melobesioideae, Corallinales, Rhodophyta) on the Pacific coast of North America. Phycologia 45: 71-115.

Former name: Lithothamnium pacificum (Foslie) Foslie
Current name: Lithothamnion phymatodeum Foslie

Steneck, R.S. & Paine, R.T. 1986. Ecological and taxonomic studies of shallow-water encrusting Corallinaceae (Rhodophyta) of the boreal northeastern Pacific. Phycologia 25: 221-240.

Former name: Membranoptera multiramosa Gardner
Current name: Membranoptera platyphylla (Setchell & Gardner) Kylin

Hawkes, M.W., Tanner, C.E. & Lebednik, P.A. 1978. The benthic marine algae of northern British Columbia. Syesis 11: 81-115.

Former name: Murrayellopsis dawsonii Post
Current name: Veleroa subulata Dawson

Stewart. J.G. 1989. Notes on marine algae of San Diego County including merger of Murrayellopsis with Veleroa. Bulletin of the Southern California Academy of Science 88:103-116.

Former name: Nemalion helminthoides (Velley) Batters
Current name: Nemalion elminthoides (Velley) Batters

Former name: Neoagardhiella baileyi (Kützing) Wynne & Taylor
Current name: Sarcodiotheca gaudichaudii (Montagne) Gabrielson

Gabrielson, P.W. 1982. Morphological studies of members of the tribe Agardhielleae (Solieriaceae, Rhodophyta) II. Sarcodiotheca gaudichaudii (Montagne) comb. nov. Phycologia 21: 86-96.

Former name: Neopolyporolithon reclinatum (Foslie) Adey & Johansen
Current name: Clathromorphum reclinatum (Foslie) Adey

Adey, W.H. 1970. A revision of the Foslie crustose coralline herbarium. Kongelige Norske Videnskabers Selskabs Skrifter 1: 1-46.

Former name: Odonthalia oregona Doty
Current name: Neorhodomela oregona (Doty) Masuda

Masuda, M. 1982. A systematic study of the tribe Rhodomeleae (Rhodomelaceae, Rhodophyta). Journal of the Faculty of Science, Hokkaido University, Series V (Botany) 12: 209-400.

Former name: Petrocelis franciscana Setchell & Gardner
Current name: Mastocarpus papillatus (C. Agardh) Kützing

West, J.A. 1972. The life history of Petrocelis franciscana. British Phycological Journal 7: 299-308.

Former name: Petrocelis haematis Hollenberg
Current name: Erythrodermis haematis (Hollenberg) Denizot

Denizot, M. 1968. Les Algues Floridées encroutantes (à l'exclusion des Corallinacées). Paris: published by author. Pp. 310, 227 figs.

Former name: Peyssonelia
Current name: Peyssonnelia

Former name: Peyssonelia rubra var. orientalis Weber-van Bosse
Current name: Peyssonnelia orientalis (Weber-van Bosse) Cormaci & Furnari

Cormaci, M. & Furnari, G. 1987. Nomenclatural notes on some Mediterranean algae. Taxon 36: 755-758.

Former name: Platythamnion heteromorphum (J. Agardh) J. Agardh
Current name: Pterothamnion heteromorphum (J. Agardh) Athanasiadis & Kraft

Athanasiadis, A. & Kraft, G.T. 1994. Description of Pterothamnion squarrulosum (Harvey) comb. nov. from southeastern Australia and southern New Zealand, with a taxonomic re-assessment of the genera Pterothamnion, Platythamnion and Glandothamnus (Ceramiaceae, Rhodophyta). European Journal of Phycology 29: 119-133.

Former name: Platythamnion pectinatum Kylin
Current name: Pterothamnion pectinatum (Kylin) Athanasiadis & Kraft

Athanasiadis, A. & Kraft, G.T. 1994. Description of Pterothamnion squarrulosum (Harvey) comb. nov. from southeastern Australia and southern New Zealand, with a taxonomic re-assessment of the genera Pterothamnion, Platythamnion and Glandothamnus (Ceramiaceae, Rhodophyta). European Journal of Phycology 29: 119-133.

Former name: Platythamnion recurvatum Wollaston
Current name: Pterothamnion recurvatum (Wollaston) Athanasiadis & Kraft

Athanasiadis, A. & Kraft, G.T. 1994. Description of Pterothamnion squarrulosum (Harvey) comb. nov. from southeastern Australia and southern New Zealand, with a taxonomic re-assessment of the genera Pterothamnion, Platythamnion and Glandothamnus (Ceramiaceae, Rhodophyta). European Journal of Phycology 29: 119-133.

Former name: Platythamnion villosum Kylin
Current name: Pterothamnion villosum (Kylin) Athanasiadis & Kraft

Athanasiadis, A. & Kraft, G.T. 1994. Description of Pterothamnion squarrulosum (Harvey) comb. nov. from southeastern Australia and southern New Zealand, with a taxonomic re-assessment of the genera Pterothamnion, Platythamnion and Glandothamnus (Ceramiaceae, Rhodophyta). European Journal of Phycology 29: 119-133.

Former name: Plocamium cartilagineum (Linnaeus) P.S. Dixon
Current name: Plocamium pacificum Kylin

Saunders, G.W. & Lehmkuhl, V. 2005. Molecular divergence and morphological diversity among four cryptic species of Plocamium (Plocamiales, Florideophyceae) in northern Europe. European Journal of Phycology 40) 293-312.

Former name: Pogonophorella californica (J. Agardh) P.C. Silva
Current name: Dasya binghamiae Millar

Millar, A.J.K. 1996. Dasya roslyniae sp. nov. (Dasyaceae, Rhodophyta), with a discussion on generic distinctions among Dasya, Eupogodon, Rhodoptilum, and Pogonophorella. Journal of Phycology 32: 145-157.

Former name: Polysiphonia flaccidissima Hollenberg
Current name: Neosiphonia flaccidissima (Hollenberg) M.S. Kim & I.K. Lee

Kim, M.S. & Lee, I.K. 1999. Neosiphonia flavimarina gen. et sp. nov. with a taxonomic reassessment of the genus Polysiphonia (Rhodomelaceae, Rhodophyta). Phycological Research 47: 271-281.

Former name: Polysiphonia mollis Hooker & Harvey
Current name: Neosiphonia tongatensis (Harvey ex Kützing) M.S. Kim & I.K. Lee

Schneider, C.W. & Searles, R.B. 1997. Notes on the marine algae of the Bermudas. 2. Some Rhodophyta, including Polysiphonia tongatensis and a discussion on the Herposiphonia secunda/tenella complex. Cryptogamie, Algologie 1997: 187-210.
Kim, M.S. & Lee, I.K. 1999. Neosiphonia flavimarina gen. et sp. nov. with a taxonomic reassessment of the genus Polysiphonia (Rhodomelaceae, Rhodophyta). Phycological Research 47: 271-281.

Former name: Polysiphonia savatieri Hariot
Current name: Neosiphonia savatieri (Hariot) M.S. Kim & I.K. Lee

Kim, M.S. & Lee, I.K. 1999. Neosiphonia flavimarina gen. et sp. nov. with a taxonomic reassessment of the genus Polysiphonia (Rhodomelaceae, Rhodophyta). Phycological Research 47: 271-281.

Former name: Porphyrella gardneri Smith & Hollenberg
Current name: Porphyra gardneri (Smith & Hollenberg) Hawkes

Hawkes, M.W. 1977. A field, culture and cytological study of Porphyra gardneri (Smith & Hollenberg) comb. nov. (= Porphyrella gardneri Smith & Hollenberg), (Bangiales, Rhodophyta). Phycologia 16: 457-469.

Former name: Prionitis angusta (Harvey) Okamura
Current name: Prionitis linearis Kylin

Gabrielson, Paul W. 2008. On the absence of previously reported Japanese and Peruvian species of Prionitis (Halymeniaceae, Rhodophyta) in the northeast Pacific. Phycological Research 56: 105-114.

Former name: Prionitis cornea (Okamura) Dawson
Current name: Prionitis lanceolata (Harvey) Harvey

Gabrielson, Paul W. 2008. On the absence of previously reported Japanese and Peruvian species of Prionitis (Halymeniaceae, Rhodophyta) in the northeast Pacific. Phycological Research 56: 105-114.

Former name: Prionitis lyallii Harvey
Current name: Prionitis sternbergii (C. Agardh) J. Agardh

Gabrielson, P.W. 2008. Molecular sequencing of Northeast Pacific type material reveals two earlier names for Prionitis lyallii, Prionitis jubata and Prionitis sternbergii, with brief comments on Grateloupia versicolor (Halymeniaceae, Rhodophyta). Phycologia 47: 89-97.

Former name: Pseudogloiophloea confusa (Setchell) Levring
Current name: Scinaia confusa (Setchell) Huisman

Huisman, J.M. 1985. The Scinaia assemblage (Galaxauraceae, Rhodophyta): a re-appraisal. Phycologia 24: 403-418.

Former name: Pterocladia caloglossoides (Howe) Dawson
Current name: Pterocladiella caloglossoides (Howe) Santelices

Santelices, B. 1998. Taxonomic review of the species of Pterocladia. Journal of Applied Phycology 10: 237-252.

Former name: Pterocladia capillacea (S.G. Gmelin) Bornet
Current name: Pterocladiella capillacea (S.G. Gmelin) Santelices & Hommersand

Santelices, B. & Hommersand, M. 1997. Pterocladiella, a new genus in the Gelidiaceae (Gelidiales, Rhodophyta). Phycologia 36: 114-119.

Former name: Pterosiphonia clevelandii (Farlow) Hollenberg
Current name: Pterosiphonia farlowii Hollenberg

Hollenberg, G. 1976. Correction of algal binomial. Taxon 25: 122.

Former name: Pterosiphonia pennata (C. Agardh) Falkenberg
Current name: Pterosiphonia pennata (C. Agardh) Sauvageau

Former name: Rhodochorton concrescens Drew
Current name: Meiodiscus concrescens (Drew) Gabrielson

Gabrielson, P.W., Widdowson, T.B., Lindstrom, S.C., Hawkes, M.W. & Scagel, R.F. 2000. Keys to the benthic marine algae and seagrasses of British Columbia, Southeast Alaska, Washington and Oregon. Phycological Contribution Department of Botany, University of British Columbia No. 5: iv + 189.
Garbary, D.J., Hansen, G.I. & Scagel, R.F. 1983. The marine algae of British Columbia and northern Washington: division Rhodophyta (red algae), class Florideophyceae, orders Acrochaetiales and Nemaliales. Syesis 15 (Suppl. 1): 1-102.

Former name: Rhodoglossum affine (Harvey) Kylin
Current name: Mazzaella affinis (Harvey) Fredericq

Hommersand, M.H., Guiry, M.D., Fredericq, S. & Leister, G.L. 1993. New perspectives in the taxonomy of the Gigartinaceae (Gigartinales, Rhodophyta). Proceedings of the International Seaweed Symposium: 105-120.

Former name: Rhodoglossum californicum (J. Agardh) Abbott
Current name: Mazzaella californica (J. Agardh) DeToni f.

Hughey, J.R., Silva, P.C. & Hommersand, M.H. 2001. Solving taxonomic and nomenclatural problems in Pacific Gigartinaceae (Rhodophyta) using DNA from type material. Journal of Phycology 37: 1091-1109.

Former name: Rhodoglossum oweniae Hollenberg & Abbott
Current name: Mazzaella californica (J. Agardh) DeToni f.

Hughey, J.R., Silva, P.C. & Hommersand, M.H. 2001. Solving taxonomic and nomenclatural problems in Pacific Gigartinaceae (Rhodophyta) using DNA from type material. Journal of Phycology 37: 1091-1109.

Former name: Rhodoglossum parvum Smith & Hollenberg
Current name: Mazzaella parva (Smith & Hollenberg) Hughey, P.C. Silva & Hommersand

Hughey, J.R., Silva, P.C. & Hommersand, M.H. 2001. Solving taxonomic and nomenclatural problems in Pacific Gigartinaceae (Rhodophyta) using DNA from type material. Journal of Phycology 37: 1091-1109.

Former name: Rhodoglossum roseum (Kylin) Smith
Current name: Mazzaella rosea (Kylin) Fredericq

Hommersand, M.H., Guiry, M.D., Fredericq, S. & Leister, G.L. 1993. New perspectives in the taxonomy of the Gigartinaceae (Gigartinales, Rhodophyta). Proceedings of the International Seaweed Symposium: 105-120.

Former name: Rhodomela larix (Turner) C. Agardh
Current name: Neorhodomela larix (Turner) Masuda

Masuda, M. 1982. A systematic study of the tribe Rhodomeleae (Rhodomelaceae, Rhodophyta). Journal of the Faculty of Science, Hokkaido University, Series V (Botany) 12: 209-400.

Former name: Rhodophysema elegans (Crouan & Crouan) Batters
Current name: Rhodophysema odonthaliae Masuda & M. Ohta

Masuda, M. & Ohta, M. 1981. Taxonomy and life history of Rhodophysema odonthaliae sp. nov. (Rhodophyta). Japanese Journal of Phycology 29: 15-21.
Saunders, G.W., Maggs, C.A. & McLachlan, J.L. 1989. Life history variation in Rhodophysema elegans (Palmariales, Rhodophyta) from the North Atlantic and crustose Rhodophysema spp. from the North Pacific. Canadian Journal of Botany 67: 2857-2872.

Former name: Rhodophysema elegans var. polystromatica (Batters) Dixon
Current name: Rhodophysema minus Hollenberg & Abbott

Saunders, G.W., Maggs, C.A. & McLachlan, J.L. 1989. Life history variation in Rhodophysema elegans (Palmariales, Rhodophyta) from the North Atlantic and crustose Rhodophysema spp. from the North Pacific. Canadian Journal of Botany 67: 2857-2872.

Former name: Rhodymenia californica var. attenuata (Dawson) Dawson
Current name: Rhodymenia californica Kylin

Gabrielson, P.W., Widdowson, T.B. & Lindstrom, S.C. 2004. Keys to the seaweeds and seagrasses of Oregon and California. Phycological Contribution 6: iv + 181.

Former name: Rhodymenia hancockii Dawson
Current name: Rhodymenia arborescens Dawson (in California)

Former name: Rhodymenia lobata Dawson
Current name: Rhodymenia pacifica Kylin

Gabrielson, P.W., Widdowson, T.B. & Lindstrom, S.C. 2004. Keys to the seaweeds and seagrasses of Oregon and California. Phycological Contribution 6: iv + 181.

Former name: Rhodymenia palmata var. mollis Setchell & Gardner
Current name: Palmaria mollis (Setchell & Gardner) van der Meer & Bird

van der Meer, J.P. & Bird, C.J. 1985. Palmaria mollis stat. nov.: a newly recognized species of Palmaria (Rhodophyceae) from the northeast Pacific coast. Canadian Journal of Botany 63: 398-403.

Former name: Rhodymenia rhizoides Dawson
Current name: Rhodymenia pacifica Kylin

Former name: Schizymenia dawsonii Abbott
Current name: Sebdenia dawsonii (Abbott) Hansen

Hansen, G.I. 1989. Schizymenia dawsonii and its relation to the genus Sebdenia (Sebdeniaceae, Rhodophyta). Taxon 38: 54-59.

Former name: Schizymenia epiphytica (Setchell & Lawson) Smith & Hollenberg
Current name: Peyssonneliopsis epiphytica Setchell & Lawson

Setchell, W.A. 1905. Parasitic Florideae of California. Nuova Notarisia 17: 59-63.
Smith, G.M. & Hollenberg, G.J. 1943. On some Rhodophyceae from the Monterey Peninsula, California. American Journal of Botany 30: 211-223.

Former name: Stenogramme interrupta (C. Agardh) Montagne
Current name: Stenogramma interrupta (C. Agardh) Montagne ex Harvey

Former name: Tenarea ascripticia (Foslie) Adey
Current name: Lithophyllum pustulatum f. ascripticium Foslie

Woelkerling, W.J. & Campbell, S.J. 1992. An account of the southern Australian species of Lithophyllum (Corallinaceae, Rhodophyta). Bulletin of the British Museum (Natural History) Botany 22: 1-107.

Former name: Tenarea dispar (Foslie) Adey
Current name: Lithophyllum dispar (Foslie) Foslie

Woelkerling, W.J. & Campbell, S.J. 1992. An account of the southern Australian species of Lithophyllum (Corallinaceae, Rhodophyta). Bulletin of the British Museum (Natural History) Botany 22: 1-107.

Former name: Trailliella intricata Batters
Current name: Bonnemaisonia californica Buffham

Former name: Yamadaea melobesioides Segawa
Current name: Yamadaia americana E.Y. Dawson & R.L. Steele

Dawson, E.Y. & Steele, R.L. 1964. An eastern Pacific member of Yamadaia (Corallinaceae) from the San Juan Islands, Washington. Nova Hedwigia 8: 1-4.
Garbary, D.J., Johansen, H.W. & Scagel, R.F. 1981. Aspects of the morphology, ultrastructure and distribution of the two species of Yamadaea Segawa (Corallinaceae, Rhodophyta). Japanese Journal of Phycology 29: 7-13.
Gabrielson, P.W., Widdowson, T.B. & Lindstrom, S.C. 2004. Keys to the seaweeds and seagrasses of Oregon and California. Phycological Contribution 6: iv + 181.

New Descriptions or New Records for California

Green Algae

Codium dawsonii P.C. Silva ined.

Codium fragile subsp. tomentosoides (van Goor) P.C. Silva

Silva, P.C. 1979. The benthic algal flora of central San Francisco Bay. In: San Francisco Bay: the Urbanized Estuary. (Conomos, T.J., ed.), pp. 287-345. San Francisco: Pacific Division, American Association for the Advancement of Science.

Bryopsis spp.

Silva, P.C. 1979. The benthic algal flora of central San Francisco Bay. In: San Francisco Bay: the Urbanized Estuary. (Conomos, T.J., ed.), pp. 287-345. San Francisco: Pacific Division, American Association for the Advancement of Science.

Caulerpa taxifolia (Vahl) C. Agardh

Jousson, O., Pawlowski.J., Zaninetti, L., Zechman, F. W., Dini, F., Di Guiseppe, G., Woodfield, R., Millar, A., & Meinesz, A. 2000. Invasive alga reaches California. Nature (London) 408: 157-58.

Capsosiphon fulvescens (C. Agardh) Setchell & Gardner

Garbary, D.J., Golden, L. & Scagel, R.F. 1982. Capsosiphon fulvescens (Capsosiphonaceae, Chlorophyta) rediscovered in the northeast Pacific. Syesis 15: 39-42.
Mathieson, A.C. & Hehre, E.J. 1994. A comparison of the marine algae from the Goleta Slough and adjacent open coast of Goleta/Santa Barbara, California with those in the southern Gulf of Maine. Rhodora 96:207-258.

Rosenvingiella radicans (Kützing) Rindi, McIvor & Guiry
In UC: Southeast Farallon Island (det. C. O'Kelly)

Rindi, F., McIvor, L. & Guiry, M.D. 2004. The Prasiolales (Chlorophyta) of Atlantic Europe: an assessment based on morphological, molecular, and ecological data, including the characterization of Rosenvingiella radicans (Kützing) comb. nov. Journal of Phycology 40: 977-997.

Ulothrix implexa (Kützing) Kützing

Lokhorst, G.M. 1978. Taxonomic studies on the marine and brackish-water species of Ulothrix (Ulotricales, Chlorophyceae) in western Europe. Blumea 24: 191-299.
Burrows, E.M. 1991. Seaweeds of the British Isles. Volume 2. Chlorophyta. pp. xi + 238, 60 figs, 9 plates. London: Natural History Museum Publications.

Ulva conglobata Kjellman
In UC: Southeast Farallon Island (det. C. Tanner 1976)

Ulva tanneri Hayden & Waaland

Tanner, C.E. 1980. Chloropelta gen. nov., an ulvaceous green alga with a different type of development. Journal of Phycology 16: 128-137.
Hayden, H.S., Blomster, J., Maggs, C.A., Silva, P.C., Stanhope, M.J. & Waaland, J.R. 2003. Linnaeus was right all along: Ulva and Enteromorpha are not distinct genera. European Journal of Phycology 38: 277-294.

Ulva pertusa Kjellman

Hayden, H.S. & Waaland, J.R. 2004. A molecular systematic study of Ulva (Ulvaceae, Ulvales) from the northeast Pacific. Phycologia 43: 364-382.

Ulva pseudocurvata Koeman & Hoek

Hayden, H.S. & Waaland, J.R. 2004. A molecular systematic study of Ulva (Ulvaceae, Ulvales) from the northeast Pacific. Phycologia 43: 364-382.

Ulvaria splendens (Ruprecht) Vinogradova
In UC: Mendocino Co., Calif. (det. P.C. Silva)

Brown Algae

Cutleria cylindrica Okamura

Stewart, J.G. 1991. Marine algae and seagrasses of San Diego County. California Sea Grant College, University of California, La Jolla, Calif. Report No. T-CSGCP-020. Pp. 197.

Chilionema ocellatum (Kützing) Sauvageau

Stewart, J.G. 1991. Marine algae and seagrasses of San Diego County. California Sea Grant College, University of California, La Jolla, Calif. Report No. T-CSGCP-020. Pp. 197.

Dictyopteris catalinensis ined.
In UC: Channel Islands

Elachista nigra Takamatsu

Kitayama, T., Miller, K.A. & Silva, P.C. 2005. First record of Elachista nigra (Chordariales, Phaeophyceae) from California, North America. Bulletin of the National Science Museum, Tokyo, Ser. B, 31: 57-61.

Ectocarpus dimorphus P.C. Silva

Silva, P.C. 1979. The benthic algal flora of central San Francisco Bay. In: San Francisco Bay: the Urbanized Estuary. (Conomos, T.J., ed.), pp. 287-345. San Francisco: Pacific Division, American Association for the Advancement of Science.

Fucus spiralis Linnaeus

Hughey, J.R., Kieldsen, C.K., Silva, P.C., Moe, R.L. & DeCew, T.C. 1996. Noteworthy collections. California. Madroño 43: 432.
Serrão, E.A., Alice, L.A. & Brawley, S.H. 1999. Evolution of the Fucaceae (Phaeophyceae) inferred from nrDNA-ITS. Journal of Phycology 35: 382-394.

Laminaria cordata Dawson

Dawson, E.Y. 1950. Notes on Pacific coast marine algae, IV. American Journal of Botany 37: 149-158.
Druehl, L.D. 1968. Taxonomy and distribution of northeast Pacific species of Laminaria. Canadian Journal of Botany 46: 539-547.

Saccharina latissima (Linnaeus) Lane, Mayes, Druehl & G.W. Saunders

Scagel, R.F., Gabrielson, P.W., Garbary, D.J., Golden, L., Hawkes, M.W., Lindstrom, S.C., Oliveira, J.C. & Widdowson, T.B. 1989. A synopsis of the benthic marine algae of British Columbia, southeast Alaska, Washington and Oregon. Phycological Contributions, University of British Columbia 3: vi + 532.

Sargassum filicinum Harvey

Miller, K.A., Engle, J.M., Uwai, S., Kawai, H. 2007. First report of the Asian seaweed Sargassum filicinum Harvey (Fucales) in California, USA. Biological Invasions 9: 609-613.

Syringoderma phinneyi Henry

Henry, E.C. & Müller, D.G. 1983. Studies on the life history of Syringoderma phinneyi sp. nov. (Phaeophyceae). Phycologia 22: 387-393.

Undaria pinnatifida (Harvey) Suringar

Silva, P.C., Woodfield, R.A., Cohen, A.N., Harris, L.H., & Goddard, J.H.R. 2002. First report of the Asian kelp Undaria pinnatifida in the northeastern Pacific Ocean. Biological Invasions 4: 333-338.

Red Algae

Antithamnion tenuissimum Gardner

Stewart, J.G. 1991. Marine algae and seagrasses of San Diego County. California Sea Grant College, University of California, La Jolla, Calif. Report No. T-CSGCP-020. Pp. 197.

Apoglossum gregarium (Dawson) Wynne

Stewart, J.G. 1974. Phrix: a new genus in Delesseriaceae (Rhodophyta). Phycologia 13: 139-147.
Wynne, M.J. 1985. Taxonomic notes on some Delesseriaceae (Rhodophyta) occurring in southern California and Mexico. Bulletin of the Southern California Academy of Sciences 84: 164-171.

Asparagopsis armata Harvey

Ní Chualáin, F., Maggs, C.A., Saunders, G.W. & Guiry, M.D. 2004. The invasive genus Asparagopsis (Bonnemaisoniaceae, Rhodophyta): molecular systematics, morphology, and ecophysiology of Falkenbergia isolates. Journal of Phycology 40: 1112-1126.

Binghamiopsis caespitosa Lee, West & Hommersand

Lee, I.K., West, J.A. & Hommersand, M.H. 1988. Binghamiopsis caespitosa gen. et sp. nov. (Lomentariaceae, Rhodophyceae) from the eastern Pacific. Korean Journal of Phycology 3: 1-13.

Aglaothamnion tenuissimum (Bonnemaison) Feldmann-Mazoyer

Josselyn, M.N. & West, J.A. 1985. The distribution and temporal dynamics of the estuarine macroalgal community of San Francisco Bay. Hydrobiologia 129: 139-152.

Callithamnion ramosissimum Gardner

Stewart, J.G. 1991. Marine algae and seagrasses of San Diego County. California Sea Grant College, University of California, La Jolla, Calif. Report No. T-CSGCP-020. Pp. 197.

Caulacanthus ustulatus (Mertens ex Turner) Kützing

Zuccarello, G.C., West, J.A., & Rueness, J. 2002. Phylogeography of the cosmopolitan red alga Caulacanthus ustulatus (Caulacanthaceae, Gigartinales). Phycological Research 50:163-172.
Miller, K.A. 2004. California's non-native seaweeds. Fremontia. A Journal of the California Native Plant Society 32: 10-15.

Ceramium kondoi Yendo

Cho, T.O., Boo, S.M. & Hansen, G.I. 2002. Structure and reproduction of the genus Ceramium (Ceramiales, Rhodophyta) from Oregon, USA. Phycologia 40: 547-571.

Ceramium interruptum Setchell & Gardner

Cho, T.O., Fredericq, S., Murray, S.N. & Boo, S.M. 2003. New insights in the taxonomy of the Ceramium sinicola complex: resurrection of C. interruptum (Ceramiaceae, Rhodophyta). Journal of Phycology 39: 775-788.

Ceramium viscainoense Dawson

Murray, S.N. & Littler, M.M. 1989. Seaweeds and seagrasses of southern California: distributional lists for twenty-one rocky intertidal sites. Bulletin of the Southern California Academy of Science 88: 61-79.

Chondracanthus armatus Hughey

Hughey, J.R. Dudash, R. & Kjeldsen, C.K. 1996. A field and molecular systematic study on species of Chondracanthus (Gigartinales, Rhodophyceae) from Pacific North America. Journal of Phycology 32: 22-23.

Colaconema bonnemaisoniae Batters

Scagel, R.F., Gabrielson, P.W., Garbary, D.J., Golden, L., Hawkes, M.W., Lindstrom, S.C., Oliveira, J.C. & Widdowson, T.B. 1989. A synopsis of the benthic marine algae of British Columbia, southeast Alaska, Washington and Oregon. Phycological Contributions, University of British Columbia 3: vi + 532.

Colaconema gymnogongri (Setchell & Gardner) Gabrielson

Gabrielson, P.W., Widdowson, T.B. & Lindstrom, S.C. 2004. Keys to the seaweeds and seagrasses of Oregon and California. Phycological Contribution 6: iv + 181.
Garbary, D.J., Hansen, G.I. & Scagel, R.F. 1983. The marine algae of British Columbia and northern Washington: division Rhodophyta (red algae), class Florideophyceae, orders Acrochaetiales and Nemaliales. Syesis 15 (Suppl. 1): 1-102.

Colaconema plumosum (Drew) Woelkerling var. plumosum

Gabrielson, P.W., Widdowson, T.B. & Lindstrom, S.C. 2004. Keys to the seaweeds and seagrasses of Oregon and California. Phycological Contribution 6: iv + 181.

Colaconema plumosum var. variabile (Drew) Gabrielson

Gabrielson, P.W., Widdowson, T.B. & Lindstrom, S.C. 2004. Keys to the seaweeds and seagrasses of Oregon and California. Phycological Contribution 6: iv + 181.

Gelidium vagum Okamura

Hughey, J.R., Kieldsen, C.K., Silva, P.C., Moe, R.L. & DeCew, T.C. 1996. Noteworthy collections. California. Madroño 43: 432.

Gracilaria vermiculophylla (Ohmi) Papenfuss

Goff, L.J., Moon, D.A. & Coleman, A.W. 1994. Molecular delineation of species and species relationships in the red algal agarophytes Gracilariopsis and Gracilaria (Gracilariales). Journal of Phycology 30: 521-537.
Bellorin, A.M., Oliveira, M.C. & Oliveira, E.C. 2004. Gracilaria vermiculophylla: A western Pacific species of Gracilariaceae (Rhodophyta) first recorded from the eastern Pacific. Phycological Research 52: 69-79.

Grateloupia lanceolata (Okamura) Kawaguchi

Miller, K.A., Hughey, J.R. & Gabrielson, P.W. 2009. First report of the Japanese species Grateloupia lanceolata (Halymeniaceae, Rhodophyta) from California, USA. Phycological Research (in press).

Leptophytum helenae Athanasiadis

Athanasiadis, A. & Adey, W.H. 2006. The genus Leptophytum (Melobesioideae, Corallinales, Rhodophyta) on the Pacific coast of North America. Phycologia 45: 71-115.

Leptophytum julieae Athanasiadis & Adey

Athanasiadis, A. & Adey, W.H. 2006. The genus Leptophytum (Melobesioideae, Corallinales, Rhodophyta) on the Pacific coast of North America. Phycologia 45: 71-115.

Leptophytum lamellicola Athanasiadis & Adey

Athanasiadis, A. & Adey, W.H. 2006. The genus Leptophytum (Melobesioideae, Corallinales, Rhodophyta) on the Pacific coast of North America. Phycologia 45: 71-115.

Mazzaella coriacea (Dawson) Hughey

Hughey, J.R., Silva, P.C. & Hommersand, M.H. 2001. Solving taxonomic and nomenclatural problems in Pacific Gigartinaceae (Rhodophyta) using DNA from type material. Journal of Phycology 37: 1091-1109.

Mesophyllum megagastri Athanasiadis

Athanasiadis, A. 2007. Revision of Dawson's collections referred to Lithothamnion lamellatum (Melobesioideae, Corallinales, Rhodophyta). Nova Hedwigia 85: 195-242.

Mesophyllum stenopon Athanasiadis

Athanasiadis, A. 2007. Revision of Dawson's collections referred to Lithothamnion lamellatum (Melobesioideae, Corallinales, Rhodophyta). Nova Hedwigia 85: 195-242.

Minium parvum Moe

Moe, R.L. 1979. Minium parvum gen. et sp. nov., a crustose member of the Rhodymeniales (Rhodophyta). Phycologia 18: 38-46.

Neorhodomela oregona (Doty) Masuda

Masuda, M. 1982. A systematic study of the tribe Rhodomeleae (Rhodomelaceae, Rhodophyta). Journal of the Faculty of Science, Hokkaido University, Series V (Botany) 12: 209-400.

Neosiphonia harveyi (J. Bailey) M.S. Kim, Choi, Guiry & G.W. Saunders

Choi, H.G., Kim, M.S., Guiry, M.D. & Saunders, G.W. 2001. Phylogenetic relationships of Polysiphonia (Rhodomelaceae, Rhodophyta) and its relatives based on anatomical and nuclear small-subunit rDNA sequence data. Canadian Journal of Botany 79: 1465-1476.
McIvor, L., Maggs, C.A., Provan, J. & Stanhope, M.J. 2001. rbcL sequences reveal multiple cryptic introductions of the Japanese red alga Polysiphonia harveyi. Molecular Ecology 10: 911-919.

Palmaria hecatensis Hawkes

Lindstrom, S.C., Olsen, J.L. & Stam, W.T. 1996. Recent radiation of the Palmariaceae (Rhodophyta). Journal of Phycology 32: 457-468.

Peyssonnelia pacifica Kylin
In UC: Southeast Farallon Island

Scagel, R.F., Gabrielson, P.W., Garbary, D.J., Golden, L., Hawkes, M.W., Lindstrom, S.C., Oliveira, J.C. & Widdowson, T.B. 1989. A synopsis of the benthic marine algae of British Columbia, southeast Alaska, Washington and Oregon. Phycological Contributions, University of British Columbia 3: vi + 532.

Phycodrys ovifolia (Kützing) Wynne

Dawson, E.Y., Acleto, O.C. & Foldvik, N. 1964. The seaweeds of Peru. Beihefte Nova Hedwigia 13: 1-111.
Wynne, M.J. 1989. Taxonomic observations on some marine algae in Herbarium Hamburgense. Nova Hedwigia 48: 419-430.
Stewart. J.G. 1989. Notes on marine algae of San Diego County including merger of Murrayellopsis with Veleroa. Bulletin of the Southern California Academy of Science 88:103-116.

Pikea pinnata Setchell

Maggs, C.A. & Ward, B.A. 1996. The genus Pikea (Dumontiaceae, Rhodophyta) in England and the north Pacific: comparative morphological, life history and molecular studies. Journal of Phycology 32: 176-193.

Pikea yoshizaki Maggs & Ward

Maggs, C.A. & Ward, B.A. 1996. The genus Pikea (Dumontiaceae, Rhodophyta) in England and the north Pacific: comparative morphological, life history and molecular studies. Journal of Phycology 32: 176-193.

Polyneuropsis stolonifera Wynne, McBride & West

Wynne, M.J., McBride, D.L. & West, J.A. 1973. Polyneuropsis stolonifera gen. et sp. nov. (Delesseriaceae, Rhodophyta) from the Pacific coast of North America. Syesis 6: 243-253.

Polysiphonia denudata (Dillwyn) Greville ex Harvey

Josselyn, M.N. & West, J.A. 1985. The distribution and temporal dynamics of the estuarine macroalgal community of San Francisco Bay. Hydrobiologia 129: 139-152.

Porphyra abbottiae Krishnamurthy
In UC: Trinidad, Humboldt County

Porphyra conwayae (Lindstrom & Cole) Lindstrom & Fredericq

Gabrielson, P.W., Widdowson, T.B. & Lindstrom, S.C. 2004. Keys to the seaweeds and seagrasses of Oregon and California. Phycological Contribution 6: iv + 181.

Porphyra fucicola Krishnamurthy
Chadborn Creek, Mendocino County and Duxbury Reef, Marin County fide DeCew et al., Kjeldsen

Porphyra hiberna Lindstrom & Cole

Lindstrom, S.C. & Cole, K.M. 1992. The Porphyra lanceolata - P. pseudolanceolata (Bangiales, Rhodophyta) complex unmasked: recognition of new species based on isoenzymes, morphology, chromosomes and distributions. Phycologia 31: 431-448.

Porphyra kanakaensis Mumford

Silva, P.C. 1979. The benthic algal flora of central San Francisco Bay. In: San Francisco Bay: the Urbanized Estuary. (Conomos, T.J., ed.), pp. 287-345. San Francisco: Pacific Division, American Association for the Advancement of Science.

Porphyra mumfordii Lindstrom & Cole

Lindstrom, S.C. & Fredericq, S. 2003. rbcL gene sequences reveal relationships among northeast Pacific species of Porphyra (Bangiales, Rhodophyta) and a new species, P. aestivalis. Phycological Research 51: 211-224.

Porphyra papenfussii Krishnamurthy
Abalone Beach, Humboldt County (DeCew et al., in HSC)

Porphyra pseudolanceolata Krishnamurthy
Humboldt County (DeCew et al., in HSC)

Porphyra rediviva Stiller & Waaland

Stiller, J.W. & Waaland, J.D. 1996. Porphyra rediviva sp. nov. (Rhodophyta): a new species from northeast Pacific saltmarshes. Journal of Phycology 32: 323-332.

Porphyra torta Krishnamurthy
Crescent City, Del Norte County; Shell Beach, Sonoma County (DeCew et al., Kjeldsen)

Schizymenia dubyi (Chauvin ex Duby) J. Agardh

Hughey, J.R. & Miller, K.A. 2009. Noteworthy collection. Madrono (in press).