Re: Elysia pilosa?

April 16, 1999
From: Kathe R. Jensen

To Lindsay and others,
There are several species of Elysia in the Indo-West Pacific which all feed on Caulerpa and have an elongate renal ridge.
Elysia expansa has a distinct black line along parapodial edges, tiny black dots on parapodia, small unbranched usually white papillae on whole body, and 2-3 pairs of thickened white glandular spots along parapodial margins.
Elysia tomentosa has a thin reddish or transparent line along parapodial edges; it is densely covered with long papillae, some of which may be branched.
The species identified as Elysia verrucosa in Debelius' book is definitely a misidentification. E. verrucosa from Hong Kong feeds on Cladophorales and has a short pericardium.
Elysia nigropunctata may also belong in the Caulerpa-feeding group, but description is poor. There are probably other, undescribed species in Japan and maybe elsewhere.

Kathe R. Jensen

KRJensen@zmuc.ku.dk

Jensen, K.R., 1999 (Apr 16) Re: Elysia pilosa?. [Message in] Sea Slug Forum. Australian Museum, Sydney. Available from http://www.seaslugforum.net/find/787

Thanks Kathe,
Have you got photos of any of these species I could post on the site? What I am still not sure of is whether Lindsay's species is identifiable, and is the species I have photographed at the top of the page E. pilosa?
Best wishes,
Bill Rudman.

Factsheet

Elysia tomentosa

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