Halgerda formosa? from East Africa

March 9, 2000
From: Bernard Picton

Note added 7 January 2004. This is almost certainly a form of H. wasinensis. See relevant discussion.

Dear Bill,
Here is a picture of a specimen collected off Pemba Island, Tanzania in February 1999 which I believe to be Halgerda formosa (H. punctata?) but I was not certain if the gills of the one you illustrated were much more branched and dense. I saw three individuals of this species so have some other photographs if it is interesting.

Best wishes,
Bernard

bernard.picton.um@nics.gov.uk

Picton, B., 2000 (Mar 9) Halgerda formosa? from East Africa. [Message in] Sea Slug Forum. Australian Museum, Sydney. Available from http://www.seaslugforum.net/find/2014

Dear Bernard,
This certainly looks like the animal I described from Zanzibar and identified as H. punctata, and which Fahey & Gosliner (1999) have reindentified as H. formosa. If your other photos show any colour variation and/or parts of the foot it would be interesting to include them as well.

I have included the original colour figures of Halgerda formosa published by Bergh in 1888 (Pl 77, figs 10, 11) some time later than the original description. They are from paintings by Moebius. I assume the red spots were originally a darker purple, though I am not too sure of the gills and rhinophores.

Best wishes,
Bill Rudman.

Rudman, W.B., 2000 (Mar 9). Comment on Halgerda formosa? from East Africa by Bernard Picton . [Message in] Sea Slug Forum. Australian Museum, Sydney. Available from http://www.seaslugforum.net/find/2014

Factsheet

Halgerda wasinensis

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