Colobonema sericeum Vanhöffen, 1903

Distribution in South America: medusa—Pacific Ocean, Colombia to Chile, from 7.17°N to 7.52°N, from 34°S to 55.84°S (Kramp 1965; Fagetti 1973 p. 42; Alvariño 1976; Pagès & Orejas 1999); Atlantic Ocean, Brazil to Argentina, from 3.29°S to 3.34°S, at 31.27°S 29.94°W, at 35.30°S 19°W, and at Strait of Magellan (Kramp 1957; Pagès & Orejas 1999; Migotto et al. 2002).

Habitat: medusa—species widely distributed between boreal and subantarctic waters (Pagès & Orejas 1999).