Rosenvingea intricata

Rosenvingea intricata (J. Agardh) Børgesen

Asperococcus intricatus J. Agardh, 1847:7.

Rosenvingea intricata (J. Agardh) Børgesen, 1914:26; Taylor, 1928:111, pl. 15: figs. 15–17; Dawson, 1944:233 [in part]; Taylor, 1945:83 [as “R. intricata prox.”]; Dawson, 1959a:19; Taylor, 1960:262, pl. 36, fig. 2; Dawson, 1961b:395; Wynne and Norris, 1976:12; Huerta-Múzquiz and Mendoza-González, 1985:46; Rocha-Ramírez and Siqueiros-Beltrones, 1991:32; Servière-Zaragoza et al., 1993:482; Mateo-Cid et al., 1993:50; González-González et al., 1996:298, 380; Mateo-Cid et al., 2000a:68; Cruz-Ayala et al., 2001:190; Abbott and Huisman, 2004:185, fig. 69A–C; Servière-Zaragoza et al., 2007:8; Pacheco-Ruíz et al., 2008:204; Pedroche et al. 2008:72.

Algae forming low-growing clumps of more or less cylindrical to compressed, crisp, hollow branches, up to 30 cm long, and subdichotomously to irregularly branched; attached by groups of rhizoids at several places along the lower branches or sometimes unattached and free-floating. Branches (2–)4–6 mm in diameter, becoming narrower distally to ultimate branches; apices mostly rounded. Transection of 3–4 cell layers, less than 100 µm thick. Cells in surface view in more or less longitudinal series or irregularly arranged. Phaeophycean hairs in groups scattered over thallus surface.

Plurilocular structures, biseriate, in small, discrete sori scattered over thallus surface.

HABITAT. On rocks or shells, in tide pools, or free-floating; mid intertidal to shallow subtidal.

DISTRIBUTION. Gulf of California: Punta Bufeo to Isla Ángel de la Guarda; Bahía Concepción to Punta Arena. Pacific coast: Isla Clarión and Isla Socorro (Islas Revillagigedo); Guerrero to Oaxaca; China; Japan; Hawaiian Islands; Ecuador.

TYPE LOCALITY. Veracruz, Veracruz (estado), Gulf of Mexico, Mexico.