Clytia simplex (Browne, 1902)

Synonyms in the area: Phialidium simplex —Browne 1902, 1908; Thiel 1938b; Browne & Kramp 1939; Vannucci 1951a; Kramp 1966; Fagetti 1973 p. 40; Ramírez & Zamponi 1980, 1981; Segura-Puertas 1984; Zamponi & Suarez 1991 [medusa].

Remarks: the distribution range provided by Ramírez & Zamponi (1981) is not based on specific records and, therefore, we did not consider that information for this species.

Distribution in South America: medusa—Pacific Ocean, Ecuador to Chile, from 3.50°S to 18.25°S, from 31.866ºS to 55.833ºS, and at northwest and southwest of Galápagos Archipelago (Kramp 1966; Fagetti 1973 p. 40; Segura-Puertas 1984; Pagès & Orejas 1999; Galea 2007 p. 90–91; Galea et al. 2007a p. 161; Palma et al. 2007a p. 73, 2007b p. 73–78, 80–81, 2011 p. 263–264, 266; Villenas et al. 2009); Atlantic Ocean, Brazil to Argentina, from 29°S to 55°S, Strait of Magellan and Malvinas (Falkland) Islands (Browne 1902, 1908; Thiel 1938b; Browne & Kramp 1939; Vannucci 1951a; Zamponi & Suarez 1991; Pagès & Orejas 1999; Migotto et al. 2002; Genzano et al. 2008a; Guerrero et al. 2013).

Habitat: medusa—on surface plankton to 50m depth (Galea 2007 p. 168).