This unidentified Gymnodoris is known from one specimen from Enewetak Atoll. It was crawling on rubbly sand at night at a depth of 12 meters on a lagoon pinnacle reef. This species resembles Gymnodoris sp. e005 in the presence of a dorsal keel near the posterior end, and they could just be larger specimens of that species, although there are some differences. G. e005 has elongate pointed foot corners while those in the species below are rounded and less long. The orange dots on this species are more regularly arranged, while those of G. e005 forn a distinct border to the top of the notum. All specimens of G. sp. 005 were on fine sand in deeper water. The radular teeth of the two species are similar, but the proportions differ: the innermost lateral of G. sp. e139 was nearly twice as large as the largest of the other teeth in mid-halfrow, while in G. sp. e005, the same tooth was only about one and a half times as large. The radular formulae differed as well: for G. sp. e139, the formula was 21x21.0.21 and three radulae examined for G. sp. e005 were 21x36.0.36, 22x40.0.40, and 20x30.0.30.
Created 1 January 2007
Updated 4 December 2021