April 29, 2010
From: Vishal Bhave
Concerning message #23404:
As per mentioned in earlier message we got two similarly looking (in Field) species one with white specks and other without.
Locality: Port Blair, 0.5 metres, Andaman & Nicobar islands, Andaman Sea, 7 March 2010, Intertidal muddy-rocky shore with scattered Halimeda and Sea grass patches. . Length: 20 mm. Photographer: Vishal Bhave.
email@example.comBhave, V.J, 2010 (Apr 29) Re: Rediscovery of Kelaart's Thuridilla coerulea from Andaman and Nicobar Islands. [Message in] Sea Slug Forum. Australian Museum, Sydney. Available from http://www.seaslugforum.net/find/23580
Sreeraj's message [#23355] shows a rather typical specimen of T. moebii, with a white-spotted brownish orange border to the parapodia. I have already discussed [message #23404] the similarities between T. coerulea, and T. undula.
Your photos here show what looks to me to be an intermediate between T. coerulea and T. moebii. The biggest problem with all these names is that we have so few records of these species that we have little knowledge of colour variability. Your messages, and Sreeraj's, from the Andaman & Nicobar Islands suggests you may be sampling a population of one species with a variable colour pattern. If this proves to be true, the oldest name would be T. coerulea.
As I discuss on the T. coerulea Fact Sheet, another similarly coloured species, T. lineolata, differs in having an orange band along the base of each parapodia.
In the close-up I have ringed the everted penis.
Rediscovery of Kelaart's Thuridilla coerulea from Andaman and Nicobar Islands
From: Vishal Bhave, April 14, 2010