Halgerda bacalusia Fahey & Gosliner, 1999 Figure 12G

Material examined.

No specimen collected.

Ecology.

Shallow coral reef habitats. Depth 5-10 m.

Distribution.

The range of this species appears to be very limited thus far including only Myanmar (Gosliner et al. 2018) and Thailand, from both the Andaman coast (Fahey and Gosliner 1999) and Gulf of Thailand (Mehrotra and Scott 2016).

Remarks.

Recorded at Koh Tao from a single individual in 2011 and not recorded since. The included figure (Fig. 12G) represents the only evidence of the species from the Gulf of Thailand. This largely agrees with the observations of the authors that specimens of the genus Halgerda are thus far exceptionally rare from within the Gulf of Thailand.