Re: Lobiger from Gulf of Mexico

September 24, 2002
From: Nishina Masayoshi

Dear Bill,
This is an interesting photo. I am not sure whether this animal is L. souverbii or not, but on seeing this photo I feel L. viridis with a blue stripe on the shell in Japan such as in my animals and this Lobiger don't look as though they are the same species to me. This animal doesn't has the secondary rolled flaps, nor the reddish pink tips of the branches of the parapodial lobes which my Lobiger always have. Also, the series of dark spots which borders the edge of the shell is quite different. I don't think Lobiger in Hachijo Is. Japan has this [see earlier message].
Best Regards,
Nishina Masayoshi

Masayoshi, N., 2002 (Sep 24) Re: Lobiger from Gulf of Mexico. [Message in] Sea Slug Forum. Australian Museum, Sydney. Available from

Thanks Nishina,
As I've said previously, I think the lack of secondary 'flaps' on the parapodia of the Caribbean animal may be distinguishing feature, but we need more imformation. The marks around the shell border are the edge of the mantle from inside the shell which extends out and recurves up over the shell. This is sensitive tissue and is often retracted so it's not always visible. You can see it in the lower left photo of the Fact Sheet for Lobiger viridis.
Best wishes,
Bill Rudman

Rudman, W.B., 2002 (Sep 24). Comment on Re: Lobiger from Gulf of Mexico by Nishina Masayoshi. [Message in] Sea Slug Forum. Australian Museum, Sydney. Available from


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