February 24, 2002
From: Atsushi Ono
The animal in the attached photo is very similar to Kato's animal. This is the animal I identified as as Eubranchus sp. 2 in my book but now I think it sacoglossa species. I had thought it was Mourgona sp....
Photo: May 28 2001, Zamami Is. 6m depth in Kerama Ids. 6mm long.
(I collected a specimen of this individual. All the big cerata came off which made it look very similar to Hamatani's painting.)
This is the second individual I have seen.
firstname.lastname@example.orgOno, A., 2002 (Feb 24) Sohgenia? from Kerama Ids. [Message in] Sea Slug Forum. Australian Museum, Sydney. Available from http://www.seaslugforum.net/find/6231
Thanks for this excellent photo. It makes me even more convinced that Hamatani's animal had lost most of its cerata when it was collected, or at least seen by him. Only two genera of the caliphyllids, Cyerce and Sohgenia, have the anus opening on a papillae midway between the eyes and the pericardium. If you look at Hamatani's drawing you can see it labelled '(a)'. If you look at Kato's photo there is a white object in the same position which I assume is the anal papilla. If so this would make his animal either Sohgenia or a Cyerce which has lost most of its cerata. The shape of the cerata, like in your photo, are cylindrical, quite unlike the flattened cerata of Cyerce. On these grounds I think we can be pretty sure that Sohgenia is not naturally 'bald' as in the original description, but has a full set of cerata, in normal circumstances. Of course its anatomy would need to be checked before we could be 100% sure.
Sohgenia palauensis? from southwestern India
From: Apte Deepak, December 21, 2009
Sohgenia. palauensis from Palau
From: Clay Carlson, March 22, 2002
Re: Transverse groove in foot of Sohgenia
From: Kathe R. Jensen, March 22, 2002
Transverse groove in foot of Sohgenia
From: Atsushi Ono, March 21, 2002
From: Atsushi Ono, March 14, 2002
Re: Sohgenia? from Kerama Ids
From: Kathe R. Jensen, March 6, 2002
Sohgenia palauensis? from Japan
From: Shoichi Kato, February 3, 2002