Ectocarpus

Belongs within: Fucophycidae.

Ectocarpus is a cosmopolitan genus of erect, filamentous brown algae (Norris 2010).

Characters (Norris 2010): Erect, uniseriate filaments, sparsely to densely irregularly branched, basally attached by rhizoids and/or prostrate filaments. Main axis may be uncorticated or, in some, corticated by descending rhizoidal filaments. Growth diffuse by intercalary meristems (among vegetative cells). Axis and branches often terminating in elongated terminal cells or colorless “pseudohairs.” Cells with one to several parietal, band-shaped or ribbonlike chloroplasts and usually several pyrenoids per plastid. Life histories isomorphic or heteromorphic with only slightly different generations; a few species known to be only asexual. Reproductive structures similar in appearance, sessile or pedicellate. Unilocular and plurilocular sporangia borne on same alga or on separate thalli. Unilocular sporangia globose or ellipsoidal, usually sessile, or terminal on short laterals. Plurilocular sporangia usually terminal, sometimes may develop from vegetative cells below a pseudohair. Plurilocular gametangia borne on separate thalli, gametes isogamous.

Ectocarpus Lyngbye 1819 (nom. cons.)N10
    |--E. acutus Setchell & Gardner 1922N10
    |    |--E. a. var. acutusS57
    |    `--E. a. var. haplogloiae Doty 1947S57
    |--E. amphibiusG64
    |--E. chantrasoides Setchell & Gardner 1922N10
    |--E. commensalis Setchell & Gardner 1922 (see below for synonymy)N10
    |--E. confervoides (Roth) LeJolis 1863S57
    |--E. corticulatus Saunders 1898N10 [=E. confervoides f. corticulatusS57]
    |--E. fasciculatus Harvey 1841N10 (see below for synonymy)
    |--E. fenestratusG64
    |--E. fructosus Setchell & Gardner 1922AH76
    |--E. gonodioides Setchell & Gardner 1924N10
    |--E. hancockii Dawson 1944N10
    |--E. isopodicola Dawson 1945AH76
    |--E. landsburgiiG64
    |--E. longifructusG64
    |--E. parvus (Saunders) Hollenberg 1971N10 (see below for synonymy)
    |--E. pusillusL27 [=Sphaerophorus pusillusG64]
    |--E. siliculosus (Dillwyn) Lyngbye 1819 [=Conferva siliculosa Dillwyn 1809]N10
    |--E. simulans Setchell & Gardner 1922N10
    |--E. sonorensis Dawson 1944N10
    |--E. taoniae Setchell & Gardner 1922AH76
    |--E. terminalis Kützing 1845S57
    `--E. tomentosus (Hudson) Lyngbye 1819S57

Ectocarpus commensalis Setchell & Gardner 1922 [=E. dimorphus Silva 1957; incl. E. confervoides f. variabilis Saunder 1898, E. variabilis (Saunders) Smith 1942 non Vickers 1905]^N10

Ectocarpus fasciculatus Harvey 1841 [incl. E. pygmaeus Areschoug in Kjellman 1872, E. confervoides f. pygmaeus (Areschoug) Kjellman 1890]^N10

Ectocarpus parvus (Saunders) Hollenberg 1971^N10 [=E. siliculosus var. parvus Saunders 1898^N10, E. confervoides f. parvus (Saunders) Setchell & Gardner 1922^N10; incl. E. eramosus Setchell & Gardner 1922^AH76, E. mesogloiae Setchell & Gardner 1922^AH76]

*Type species of generic name indicated

References

[AH76] Abbott, I. A., & G. J. Hollenberg. 1976. Marine Algae of California. Stanford University Press.

[G64] Gray, J. E. 1864. Handbook of British Water-weeds or Algae. R. Hardwicke: London.

[L27] Laing, R. M. 1927. A reference list of New Zealand marine algae. Transactions and Proceedings of the New Zealand Institute 57: 126–185.

[N10] Norris, J. N. 2010. Marine algae of the northern Gulf of California: Chlorophyta and Phaeophyceae. Smithsonian Contributions to Botany 94: 1–276.

[S57] Scagel, R. F. 1957. An annotated list of the marine algae of British Columbia and northern Washington (including keys to genera). National Museum of Canada Bulletin 150: 1–289.