Dorgan, Valdes & Gosliner, 2002
Known only from two records from deepwater off Philippines [166-172 m] and Thailand [303-313 m].
Locality: Andaman Sea, 303-313 m, Thailand, Indian Ocean, 22 February 2000, dredged with Agassiz trawl. Length: approx. 40 mm preserved. Photographer: Kathe Jensen.
The body is very flat and wide, as is usual in the genus, and the rhinophore and gill sheaths are elevated. In the original description the general colour of the preserved specimen is described as 'pale cream' but the photograph accompanying the description would be better describd as pale brown. There are a number of large dark brown rings, some of them irregular in shape, scattered over the dorsum, and each brown ring has a faint whitish ring outside. The underside is a uniform pale cream with no sign of darker markings. Platydoris ocellata also has dark brown rings, but they are much smaller and surround white spots. There are also differences in the reproductive anatomy.
K.M. Dorgan, A. Valdes and T.M. Gosliner. 2002. Phylogenetic systematics of the genus Platydoris (Mollusca, Nudibranchia, Doridoidea) with descriptions of six new species. Zoologica Scripta, 31: 271-319.
Jensen, K.R. 2008 The opisthobranch molluscs collected during the Thai-Danish BIOSHELF project in the Andaman Sea Thailand. Phuket Marine Biological Center Research Bulletin, 68: 21-30.
Rudman, W.B., 2008 (October 14) Platydoris annulata Dorgan, Valdes & Gosliner, 2002 . [In] Sea Slug Forum. Australian Museum, Sydney. Available from http://www.seaslugforum.net/factsheet/platannu
Re: Opisthobranchs from the Andaman Sea
From: Philip Cromwell, October 15, 2008