Doris cf. immonda Risbec, 1928

Mehrotra, Rahul, A. Caballer Gutierrez, Manuel, M. Scott, Chad, Arnold, Spencer, Monchanin, Coline, Viyakarn, Voranop & Chavanich, Suchana, 2021, An updated inventory of sea slugs from Koh Tao, Thailand, with notes on their ecology and a dramatic biodiversity increase for Thai waters, ZooKeys 1042, pp. 73-188 : 73

* Doris cf. immonda Risbec, 1928 Figure 13G

Material examined.

One specimen 5 mm, HF.

Ecology.

Under reef rubble and on rocks in coral reef habitats. Cryptic on its orange prey sponge. Depth 6-12 m.

Distribution.

Doris immonda is known across the Indo-Pacific including Japan ( Rudman 2000a), Australia ( Nimbs and Smith 2016), Papua New Guinea, New Caledonia, Hawaii ( Gosliner et al. 2008), and the Pacific coast of Costa Rica ( Camacho-García and Gosliner 2008b). Here representing a first record for Thai waters.

Remarks.

Broadly matches the description and variations highlighted by Valdés (2002); however, like specimens of D. cf. granulosa , specimens documented from Koh Tao differ in colouration from Doris immonda . The dorsal colour is a bright orange with numerous rounded or conical tubercles covering the surface, many capped in white. The Y-shaped marking between the rhinophores to in front of the gills is made up of purple tubercles and the rhinophore club is a pale brown with white edges of lamellae. As above, this variation in colouration may yet be considered to be within what can be found in Doris immonda Risbec, 1928.

Figures

Figure 13. A Rostanga sp. 18 mm B Sebadoris fragilis 70 mm C Thordisa sp. 12 mm D Doriopsis cf. granulosa 7 mm E Doriopsis pecten 6 mm F Doriopsis viridis 4 mm G Doris cf. immonda 5 mm H, I Dorididae sp. 15 mm (H photograph by Jeremy Coz) and 8 mm (I) J Goniodoridella sp. 1 6 mm K Goniodoridella sp. 2 3 mm (photograph by Khumron Waipaka) L Trapania cf. gibbera 5 mm.