Eubranchus rubropunctatus or E. mandapamensis

April 13, 2010
From: Lawrence Neal

Concerning message #4869:

Dear Bill,

Here are a couple of photos of Eubranchus rubropunctatus from the Andaman Sea. Both of these individuals were found on the underside of an old wooden log, lying on sand close to the shore. Both are about the same size, around 8-10 mm.

The pictures show the pale blue band on the cerata with characteristic small dark reddish spots. One individual has orange-pale blue-yellow bands on the cerata, while the other one has orange-pale blue-orange bands.

Locality: Tablamu, 6 metres, Phangnga, Thailand, Andaman Sea, 20 March 2010, Decaying tree trunk on rocky shore. Length: 8 mm. Photographer: Lawrence Neal.

Best regards,

Lawrence

lorenzo_n@yahoo.com

Neal, L., 2010 (Apr 13) Eubranchus rubropunctatus or E. mandapamensis. [Message in] Sea Slug Forum. Australian Museum, Sydney. Available from http://www.seaslugforum.net/find/23406

Dear Lawrence,

In an earlier message [#22443] I discussed whether E. rubropunctatus was different from E. mandapamensis or not. The main difference was whether the rhinophores had scattered papillae [E. rubropunctatus] or regular rings [E. mandapamensis]. I think your animals are about halfway between so I tend to think that we should consider there is just one species, the earliest name being E. mandapamensis.

It would be nice for someone to compare the two radular types or to find both forms living together.

Best wishes, 
Bill Rudman

Rudman, W.B., 2010 (Apr 13). Comment on Eubranchus rubropunctatus or E. mandapamensis by Lawrence Neal. [Message in] Sea Slug Forum. Australian Museum, Sydney. Available from http://www.seaslugforum.net/find/23406

Factsheet

Eubranchus mandapamensis

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