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Unidentified shells



 
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wei





Joined: 30 Jan 2009
Posts: 37

PostPosted: 30.06.2009, 12:22    Post subject: Unidentified shells Reply with quote

Here are some shells I would very much appreciate help with:

'Ovulidae_a' resembles Cuspivolva formosa, but I am unsure. 11mm.


'Ovulidae_b' seems to be Crenavolva trailli. 11.5mm.


'Ovulidae_c' is a Crenavolva but I am unsure which one. 9mm.


'Ovulidae_d' is a Crenavolva, which I've previously identified as a large C. leopardus, as the latter is rather common in the vicinity. 10mm.


Thanks in advance!
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wei





Joined: 30 Jan 2009
Posts: 37

PostPosted: 30.06.2009, 12:38    Post subject: Reply with quote

Attached below is a photograph of the living animal of:
'Ovulidae_a'
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felix
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Joined: 25 Jan 2009
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PostPosted: 04.07.2009, 09:37    Post subject: Reply with quote

Hello

No. 1 is a stunted form of Cuspivolva formosa. Occasionally these are found also in PI.

No. 2 is Crenavolva traillii

No. 3 is a small Crenavolva matsumijai

No. 4 yes, C. leopardus
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wei





Joined: 30 Jan 2009
Posts: 37

PostPosted: 05.07.2009, 09:32    Post subject: Reply with quote

Thanks!

No. 3 does resemble C. matsumiyai. It seems close to C. guidoi too. I presume the colour, striation, thinner outer lip and heavier dentition point to the former? The shell was picked up in Singapore, and if it does prove to be C. matsumiyai, wouldn't that be a significant range extension? Perhaps you can enlighten if this species has been discovered in the Philippines.

Attached is a photograph of the living animal, not showing much of the mantle unfortunately.
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felix
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PostPosted: 06.07.2009, 04:21    Post subject: Reply with quote

I do not know all that much about Singapore, but I found the matsumijai in the South China Sea (Damar Is., near Borneo) and the Java Sea (Kangean Is.), at Bunaken (N. Sulawesi) and Balicasag (Bohol, very large shells), and it was repeatedly found in Kavieng, New Ireland, Papua New Guinea, so the species seems to be pretty much all over the place. Problem is they are almost always deep (35-50 m). I have found guidoi only once, in some place in Malaysia, not far south of Singapore (travelling on board the MV Empress). Those had a pitch-black animal.
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wei





Joined: 30 Jan 2009
Posts: 37

PostPosted: 06.07.2009, 07:15    Post subject: Reply with quote

Thanks for the discussion.
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