Nemacystus brandegeei (Setchell & N. L. Gardner) Kylin 1940

Nemacystus brandegeei (Setchell et N. L. Gardner) Kylin

Meneghiniella brandegeei Setchell et N. L. Gardner, 1924b:5; Setchell and Gardner, 1925:549, pl. 47: fig.11, pl. 49: fig.16.

Nemacystus brandegeei (Setchell et N. L. Gardner) Kylin, 1940:49; Dawson, 1944:232; Dawson, 1949:230; Dawson, 1959a:19, fig. 2; Dawson, 1961b:392; Hommersand, 1972:70; Norris, 1973:6; Huerta-Múzquiz and Mendoza-González, 1985:46; González-González et al., 1996:155; de Jong and Prud’homme van Reine, 1997:6; de Jong, 1999:88; L. Aguilar-Rosas et al., 2000:132; Mateo-Cid et al., 2006:58; Pacheco-Ruíz et al., 2008:204; Pedroche et al., 2008:62.

Haplogloia andersonii sensu Norris, 1973:6; Pacheco-Ruíz et al., 2008:204 [non Haplogloia andersonii (Farlow) Levring, 1939:50; basionym: Mesogloia andersonii Farlow, 1889:6].

Algae soft, dark-brown, slender cylindrical main axes, irregularly and alternately branched, mostly up to 20 cm (to 1.0 m) long and up to 500–600(–1000) µm in diameter. Main axis and branches develop from a single apical cell; initial axial filament more evident in upper portions. Internally of large, thin-walled, colorless, pseudoparenchymatous cells; innermost up to 100 µm wide by up to 400 µm long; outward mostly 45 µm by 125 µm; outermost cells 36 µm by 65 µm. Assimilatory filaments up to 140(–160) µm in length, composed of 6–12 cells with discoid plastids; basal cells smaller, 5–7 µm in diameter, distal cells relatively larger and moniliform, 7–10(–13) µm in diameter. Phaeophycean hairs with a basal meristem; 3–8 µm in diameter.

Unilocular sporangia ovoid, 41 µm long by 32 µm in diameter. Plurilocular sporangia on single or branched pedicels; mostly uniseriate, up to 50 µm long, and up to 10 µm in diameter.

HABITAT. Epiphytic or entangled with various algae, notably Sargassum; low intertidal to shallow subtidal.

DISTRIBUTION. Gulf of California: Puerto Peñasco to La Paz. Pacific coast: west side of Laguna Ojo de Liebre (Scammon’s Lagoon), opposite Isla La Concha (Baja California Sur).

TYPE LOCALITY. La Paz, Baja California Sur, Gulf of California, Mexico.