Variation in Phyllidia ocellata

July 2, 2002
From: Bernard Picton

Hi Bill,
I've noticed that Phyllidia ocellata in Indonesia [Photo d] looks quite different from those I've seen in East Africa and the Red Sea. I wonder if there is some geographic variation here (ie. subspecies) or if in fact there are several species in the P. ocellata complex. These Pemba Is. ones [Photos a-c] show the variation between Yonow's P. o. undula and 'typical' P. ocellata to be continuous within one population though.

Upper Right: March 1996 - Bali, Indonesia.
Lower Left, Right: Feb 1999 - Pemba Is., East Africa. PHOTOS: B.E.Picton.

Bernard

bernard.picton.um@nics.gov.uk

Picton, B. , 2002 (Jul 2) Variation in Phyllidia ocellata. [Message in] Sea Slug Forum. Australian Museum, Sydney. Available from http://www.seaslugforum.net/find/5947

Thanks Bernard,
Quite an interesting series. Perhaps the animals with a tuberculate ridge down the dorsal midline, including 'P. undula' will turn out to be a distinct species. My problem has been that 'revisions' have been based on so few animals and so few characters. And there are also the 'satellite' species such as P. babai. Yasuhiro Shirai's photo of probable P. babai and P. ocellata mating certainly suggests we don't know the full story as yet. The animal on the orange sponge is another nice feeding indication. I don't suppose we could be so lucky as to find they have different feeding preferences.
Cheers,
Bill Rudman

Rudman, W.B., 2002 (Jul 2). Comment on Variation in Phyllidia ocellata by Bernard Picton . [Message in] Sea Slug Forum. Australian Museum, Sydney. Available from http://www.seaslugforum.net/find/5947

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Phyllidia ocellata

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