Halopteris alternata (Nutting, 1900)

Synonyms in the area: Plumularia alternata —Fraser 1938a; Calder et al. 2003 [polyp]; Antennella diaphana diaphana —Van Gemerden-Hoogeveen 1965 [polyp]; Halopteris diaphana diaphana —Vervoort 1967 [polyp]; Halopteris diaphana —Migotto, 1996 [part] [polyp].

Distribution in South America: polyp—Pacific Ocean, Colombia, at 5.99°N 77.36°W in Port Utria, Ecuador, at 1.38°N 91.81°W in Isla Wolf, at 1.23°S 90.45°W in Isla Floreana, at 2.19°S 80.90°W in Santa Elena Bay (Fraser 1938a; Calder et al. 2003); Atlantic Ocean, at Aruba Island, at Curaçao Island, at Bonaire Island, Colombia, at Puerto Colombia, Venezuela, at La Tortuga Island, at Los Frailes Island, Brazil, at 0.92°N 29.37°W, at 3.54°S 38.8°W, at 9.84°S 35.88°W, from 23.70°S to 24°S (Van Gemerden-Hoogeveen 1965; Vervoort 1967; Migotto 1996; Schuchert 1997; Amaral et al. 2002b, 2010a; Migotto et al. 2002; Shimabukuro & Marques 2006a, abstract; Shimabukuro 2007; Maronna et al. 2008, abstract; Silveira & Morandini 2011; Fernandez et al. 2014, 2015).

Habitat: polyp—from intertidal zone to 274m, on algae, fouling, bryozoans, Eudendrium caraiuru, mussels, polychaete tubes, sponges (Fraser 1938a; Migotto 1996; Schuchert 1997; Calder et al. 2003; Shimabukuro 2007; Amaral et al. 2002b, 2010a; Fernandez et al. 2014, 2015).