Obelia microtheca Fraser, 1938a

Remarks: this species was included in the synonymy of Obelia dichotoma (Linnaeus, 1758) by Cornelius (1975) and Calder (1991), but we follow Calder et al. (2009) and maintain it separate, pending more detailed study.

Distribution in South America: polyp—Pacific Ocean, Ecuador, at 2.18°S 80.90°W in La Libertad, at 2.14°S 81°W in Santa Elena Bay, Peru, at 14.25°S 76.17°W in Bahia Independencia (Fraser 1938a, 1938b, 1948; Calder et al. 2009).

Habitat: polyp—from 5 to 18m depth, on rock, shells, gorgonids, bryozoans, octocoral stems (Fraser 1938a, 1938b; Calder et al. 2009).