Ulva compressa

Ulva compressa Linnaeus

Ulva compressa Linnaeus, 1753:1163; Linnaeus, 1755:433; Blomster et al., 1998:332, figs. 50 (typotype), 55–57; Hayden et al., 2003:289, tbl. 4; Mateo-Cid et al., 2006:48, 58; Pedroche et al., 2005:24; Pacheco-Ruíz et al., 2008:191, 201.

Enteromorpha compressa (Linnaeus) Link ex Nees, 1820:Index [2]; León-Tejera et al., 1993:199; González-González, 1993:443; Servière-Zaragoza et al., 1993:482; Leskinen and Pamilo, 1997:17; Bucio-Pacheco and Dreckmann, 1998:42; Yoshida, 1998:34; Paul-Chávez and Riosmena-Rodríguez, 2000;144; Abbott and Huisman, 2004:48, fig. 5D.

Enteromorpha compressa (Linnaeus) Greville, 1830:180, pl. 18: figs. 1–3; Setchell and Gardner, 1903: 213; Collins, 1909b:201; Setchell and Gardner, 1920b:251, pl. 14: figs. 7, 8, pl. 16: fig. 3; Setchell and Gardner, 1924a:716; Dawson, 1944:203; Dawson, 1949:236; Dawson, 1957b:7; Dawson, 1959a:4, 6, 11; Dawson, 1961b:373; Dawson, 1962b:228; Dawson, 1962c:278; Bliding, 1963:132, figs. 82–84; Dawson, 1966a:5; Huerta-Múzquiz and Tirado-Lizárraga, 1970:126; Chávez B., 1972:268; Norris, 1973:3, 17; Norris, 1976a:74, fig. 29; Devinny, 1978:358; Huerta-Múzquiz, 1978:336; 338; Silva, 1979:340; Pedroche and González-González, 1981:63; Koeman and van den Hoek, 1982a:288, figs. 2–30; Huerta-Múzquiz and Mendoza-González, 1985:42; Mendoza-González and Mateo-Cid, 1985:22; Mendoza-González and Mateo-Cid, 1986:419; Dreckmann et al., 1990:24; Mateo-Cid and Mendoza-González, 1991:27; Martínez-Lozano et al., 1991:23; Mendoza-González and Mateo-Cid, 1992:23; Mateo-Cid and Mendoza-González, 1992:24; Mateo-Cid et al., 1993:51; León-Tejera and González-González, 1993:497; León-Tejera et al., 1993:199; Mateo-Cid and Mendoza-González, 1994a:51; Mateo-Cid and Mendoza-González, 1994b:44; Mendoza-González et al., 1994:112; González-González et al., 1996:283; Mendoza-González and Mateo-Cid, 1996:74, 87, pl. 23: figs. 102, 103; Blomster et al., 1998:319, figs. 4–6, 10–15, 30–40, 55–57; L. Aguilar-Rosas et al., 2002:235; Dreckmann et al., 2006:153.

Algae mostly compressed, sometimes more or less tubular; up to 10 cm tall and mostly to 5 mm wide; upper portions usually sparsely branched (rarely unbranched); branches more slender near their branching origin and usually broadening distally; sometimes with microscopic, multiseriate or rarely uniseriate, branchlets; basal portion tapering to holdfast of rhizoidal cells. Cells in surface view, more or less quadrate, angular or rounded, 8–15 µm in diameter; irregularly arranged throughout; with 1 or occasionally 2 pyrenoids.

HABITAT. On rocks, usually in exposed habitats; also in mudflats and estuaries, sometimes free-floating, rarely epiphytic; high to mid intertidal (also dredged 4–32 m; Dawson, 1944).

DISTRIBUTION. Gulf of California: Las Piedras del Burro to Bahía de La Paz. Pacific coast: Alaska to Costa Rica; Peru; Chile; Hawaiian Islands; China; Japan.

TYPE LOCALITY. Probably Bognor, Sussex, England (based on selection of lectotype illustration of Dillenius [1742:pl. 9: fig. 8] and typotype [see Stearn, 1957:129] by Blomster et al. [1998:332, figs. 50, 55–57]).