Jorunna zania or J. funebris?

July 31, 1999
From: Ernest C.J. Seamark

This individual is unlike the Jorunna zania that are common residents at Treasure Beach intertidal zone seen feeding on blue sponge. This individual was found on 13 August 1998.

Is Jorunna zania recognised in South Africa or is it Jorunna funebris?

[Treasure Beach is in Durban, KwaZulu Natal, South Africa.]

Ernest Seamark.

kearneyt@biology.und.ac.za

Seamark, E.C.J., 1999 (Jul 31) Jorunna zania or J. funebris?. [Message in] Sea Slug Forum. Australian Museum, Sydney. Available from http://www.seaslugforum.net/find/1050

Dear Ernest,
I am afraid I have never been comfortable with some of the anatomical distinctions Marcus made in the 1976 paper. The photo of Jorunna zania Marcus, 1976, in Terry Gosliner's South African book looks identical to Jorunna funebris and your comment that it feeds on a blue sponge certainly suggests a close similarity with animals from the western Pacific.

The photograph you have sent is most probably a variation from the normal pattern you see in South Africa. However it's hard to be sure from a single photo, with no indication of size. perhaps you should look for more similarly coloured specimens and see if they diffre from 'normal' patterned animals in things like food sponge and shape and colour of egg ribbon.

Best wishes,
Bill Rudman.

Rudman, W.B., 1999 (Jul 31). Comment on Jorunna zania or J. funebris? by Ernest C.J. Seamark. [Message in] Sea Slug Forum. Australian Museum, Sydney. Available from http://www.seaslugforum.net/find/1050

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