* Gymnodoris cf. nigricolor Baba, 1960 Figure 16C

Material examined.

One specimen 6 mm, SB; one specimen 7 mm, LB.

Ecology.

Recorded exclusively from deeper soft sediment habitats, crawling on the substrate. Depth 19-27 m.

Distribution.

Unknown

Remarks.

Strikingly similar to Gymnodoris nigricolor from Koh Tao in sharing habitat, size, and much of their external morphology except the arc of gills. Both observed specimens, several months and kilometres apart, were found to possess white club-shaped gills instead of black. As such we treat this species as likely distinct.