Leuckartiara octona (Fleming, 1823)

Synonyms in the area:? Perigonimus repens —Hartlaub 1905 [polyp]; Perigonimus repens —Fraser 1938a, 1938b, 1939, 1948; Calder et al. 2003; Halitholus intermedius —Genzano et al. 2008a [medusa] [non Halitholus intermedius (Browne, 1902)].

Distribution in South America: polyp—Pacific Ocean, Ecuador, from 0.1°S to 1.4°S in Galápagos Archipelago (Fraser 1938a, 1938b, 1939, 1948; Calder et al. 2003); Chile, at 39.95°S 73.60°W, and from 53.30°S to 55°S (Hartlaub 1905 p. 530–531; Jäderholm 1917; Galea & Schories 2012a p. 26); Atlantic Ocean, Brazil to Argentina, at 20.28°S 40.26°W, at 23.83°S 45.42°W, and at Malvinas (Falkland) Islands in Port Stanley (Hartlaub 1905 p.

530–531; Grohmann 1997, 2006; Grohmann et al. 1997; Migotto 1996; Migotto et al. 2002; Shimabukuro 2007; Miranda et al. 2015); medusa—Pacific Ocean, Colombia to Chile, from 7.50°N to 4.82°N, from 3.50°S to 18.25°S, from 29.95ºS to 55.92ºS, and at Pascua Island (Kramp 1966; Fagetti 1973 p. 37; Alvariño 1976; Cely & Chiquillo 1993; Palma 1994; Palma & Rosales 1995; Pagès & Orejas 1999; Galea 2007 p. 28–29; Palma et al. 2007a p. 70, 2007b p. 74, 78, 80, 2014a; Villenas et al. 2009; Chirichigno, pers. comm.; Pavez et al. 2010; Bravo et al. 2011); Atlantic Ocean , Brazil to Argentina, from 23.5°S to 24.2°S, from 29°S to 46.48°S, and at Beagle Channel (Navas- Pereira 1974, 1981; Zamponi 1983a; Migotto 1996; Tronolone 2001; Migotto et al. 2002; Genzano et al. 2008a; Nascimento 2010; Silveira & Morandini 2011).

Habitat: polyp—from 1.5m to 128m depth, on crab carapace and on Cerithium atratum and Strombus pugilis (Fraser 1938a, 1938b, 1948; Migotto 1996; Calder et al. 2003; Shimabukuro 2007; Galea & Schories 2012a); medusa—species with large dispersal capabilities (Zamponi 1983a).