Synonyms in the area: Tiaropsis davisii Browne, 1902 [medusa]; Cosmetirella simplex Browne, 1910; Vanhöffen 1912 [medusa]; Cosmetirella kerguelensis Vanhöffen, 1912 [medusa].
Distribution in South America: medusa—Pacific Ocean, Chile, from 37.15°S to 55.84°S (Kramp 1966; Pagès & Orejas 1999); Atlantic Ocean, Brazil to Argentina, from 29°S to 55°S, at Malvinas (Falkland) Islands, at Strait of Magellan, at South Georgia (Browne 1902; Vanhöffen 1912; Kramp 1932, 1957; Thiel 1938a; Browne & Kramp 1939; Navas-Pereira 1974, 1981; Zamponi 1983a, 1985; Ramírez & Zamponi 1980; Pagès & Orejas 1999; Migotto et al. 2002; Genzano et al. 2008a; Guerrero et al. 2013).
Habitat: medusa—in subantarctic and antarctic waters (Kramp 1959a).