Hypselodoris maculosa? from SE Sulawesi

July 8, 2002
From: Lindsay Warren

Dear Bill
I wonder if you could help me with this chap. I found this specimen (OS0142) at a depth of 59ft on 20 May 1999 on Pulau Hoga, Tukang Besi Archipelago, SE Sulawesi. L:10mm. Initially I thought it was simply a colour variation of Hypselodoris maculosa but now I have my doubts having reread a Sea Slug Forum posting from Terry Gosliner (Gosliner, T., 1999 (December 18) in which he states "In H. maculosa, the glands are interrupted in the middle region of the body."

As you can see in OS0142, there are no mantle glands along the anterior and posterior mantle, only down the sides. Also, the white rhinophores with translucent bases have 3 orange bands and are tipped in orange. I think I am right in saying that H. maculosa rhinophores are usually tipped in white. I would be most interested to hear your thoughts on this one.

Many thanks for your help.
All the best
Lindsay

alldcl@compuserve.com

Warren, L., 2002 (Jul 8) Hypselodoris maculosa? from SE Sulawesi. [Message in] Sea Slug Forum. Australian Museum, Sydney. Available from http://www.seaslugforum.net/find/7063

Dear Lindsay,
This is an interesting point. If you look at John Hicks photos from Christmas Island you can clearly see an animal with mantle glands as described by Terry. However your photo, and others on the Forum certainly show glands down each side - whether there are glands anteriorly and/or posteriorly are difficult to see in the photos. When I revised this species many years ago I decided that the number of orange-red bands on the rhinophore clubs was variable, ranging from one to three. It is of course possible that there are in fact 3 species in the complex. Certainly your 3 banded form has glands down the sides of the mantle, and John Hick's one-banded form has no glands down the side. I will have to check the 2-banded form.

Certainly an interesting little puzzle.
Cheers,
Bill Rudman

Rudman, W.B., 2002 (Jul 8). Comment on Hypselodoris maculosa? from SE Sulawesi by Lindsay Warren. [Message in] Sea Slug Forum. Australian Museum, Sydney. Available from http://www.seaslugforum.net/find/7063

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Hypselodoris maculosa

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