* Hypselodoris cf. juniperae Gosliner & Johnson, 2018 Figure 11A

Material examined.

One specimen 6 mm, CB.

Ecology.

Observed under a dead fungiid coral skeleton in shallow coral reef. Depth 6 m.

Distribution.

Hypselodoris juniperae is currently known from Madagascar (Epstein et al. 2018) and potentially South Africa, Sri Lanka, and Réunion Island (Bidgrain 2005; Ogden 2005; Houben 2007). A similar species represents a first record for Thai waters.

Remarks.

Externally similar to both Hypselodoris maculosa (Pease, 1871) and Hypselodoris juniperae Gosliner & Johnson, 2018 in bearing thin longitudinal white lines, dark purple spots, an opaque orange marginal band and white gills with red apices. Identified as the former species in Mehrotra and Scott (2016). Observed living sympatrically with H. decorata, readily distinguished by bearing two red rhinophoral rings and purple rather than reddish brown body colouration. Given the close relationship between all three species, a much closer study is required. Only a single individual has been observed in the area to date.