Re: Ercolania coerulea from Tanzania
March 12, 2005
From: Bill Rudman
PHOTOS:Oyster Bay, Dar es Salaam, Tanzania. 25 Feb 1978 on algae Dictyosphaeria cavernosa. 8 animals, largest 12mm long alive. Photos: Bill Rudman
To accompany Kathe Jensen's photos of Ercolania coerulea from Hong Kong [message #13313 ], I have decided to add some close-ups of the photos I posted earlier [message #6580] of this species from Tanzania. In these you can see the branched green digestive gland ducts ramifying through the rhinophores and the head, and up into the cerata. In the lower photo, opaque white pigmentation covers the tip of each ceras and forms a short line down each edge of the ceras, as described by Schmekel & Portmann for Mediterranean specimens [see Fact Sheet], but there is no sign of the blue spots mentioned by them. The dull whitish spots all over the cerata are glands, rather than surface pigmentation, and do appear bluish in certain light.
Bill Rudman
Rudman, W.B., 2005 (Mar 12) Re: Ercolania coerulea from Tanzania. [Message in] Sea Slug Forum. Australian Museum, Sydney. Available from http://www.seaslugforum.net/find/13310Related messages
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