nightfly's picture

Azorinus chamasolen bivalve.

Observed: 17th December 2011 By: nightflynightfly’s reputation in Invertebratesnightfly’s reputation in Invertebratesnightfly’s reputation in Invertebratesnightfly’s reputation in Invertebratesnightfly’s reputation in Invertebrates
17 Dec 11 (13)
17 Dec 11 (14)
Description:

Any assistanve with an ID much appreciated, so far I cant find its likeness on websites.

Identifications
Species interactions

No interactions present.

Comments

nightfly's picture

Nick,That one in the French

Nick,

That one in the French website isnt far away at all, might well be that, the brown skin is even on it (whatever the film on the surface is called, I bet Ive read it on MarLIN in the past).

Cheers, I think Chris is having a go.

Martin, I have to check that one out, I havent a clue what it is, thank you for the ID.

GrizzledBadger the gaper might be totally correct, thank you also for the ID, some others reckon a gaper.

Cathal.

GrizzledBadger's picture

Could that brown skin be the

Could that brown skin be the 'periostracum'?
Common Otter shell, Lutraria lutraria has a brown one with a glossy cream shell.

Brock

nightfly's picture

Hi Brock, I'm not sure of its

Hi Brock,

I'm not sure of its name, it seems to be a feature of a few bivalves. I wonder why some species have it and some dont? Sorry for late response!

Cathal.

martinjohnbishop's picture

It is indeed the

It is indeed the periostracum. They all have it but it easily wears off. Even Capaea has it. Martin

nightfly's picture

Cheers Martin. I was going to

Cheers Martin. I was going to say earlier that I thought it was on mussels but then I doubted that.

Cathal.

martinjohnbishop's picture

I should have mentioned that

I should have mentioned that it is made of chitin (like insects).
Did you read my learned article? Bishop, M.J. 1977. The Mollusca of acid woodland in West Cork and Kerry. Proc. R. Irish Acad. 77B, 227-244.

nightfly's picture

Not yet Martin but I'd like

Not yet Martin but I'd like to. I could only manage to find other papers which referenced your one?

Cathal.

ChrisMcA's picture

Didn't find this easy as

Didn't find this easy as several sp's could match the outside, & not easy to see hinge line detail on interior, (& many phots of Azorinus c. dont show any muscle marks; but based on http://eol.org/data_objects/13238143 the muscle scars don't match with Mya arenaria, & from http://www.sub-vidayfoto.com/principal.asp?idioma=1&link_directo=ficha&i... (ie the top interior), reckon it's Azorinus chamasolen (& my Collins gives size up to 6cm)(but I'd be interested in your opinions)

martinjohnbishop's picture

This species is described

Tellinoidea : Solecurtidae This species is described at
http://naturalhistory.museumwales.ac.uk/britishbivalves/browserecord.php...

The hinge line in the above photograph is unclear as sandy and not quite in focus. Do you still have the shell so we could have a clearer view of the hinge?

nightfly's picture

Martin I didnt keep it, but I

Martin I didnt keep it, but I think I could find another with a bit of luck, Ive seen it regularly on the same beach. Sorry for short response, yourself and Chris seem to have come to the same conclusion.

Thanks Chris and Martin for looking into this, more later, I'm attempting to look at way too many things at once as usual...

Cathal.

nightfly's picture

Thanks Martin, Sorry for

Thanks Martin,

Sorry for taking so long to view your link but to my eye that is very similar and I am perfectly happy with that ID, as Chris also agrees then its more than likely Azorinus chamasolen. I will hopefully be able to post close up shots of the hinge of another example of it in the near future for further confirmation.

Thankyou.

Cathal.

nightfly's picture

Great pics there of an

Great pics there of an identical bivalve in that second link. Yeah the first one just doesnt fit the bill as you say.

Cheers Chris, I'll be needing your assistance in the future no doubt.

Cathal.

ChrisMcA's picture

Just thought this a good

Just thought this a good place to mention 3 Ispot molluscan mysteries you all might have missed; 1) Brittany ophistobranch/ shell-less mollusc 8" pink boot-shaped which baffled nick & me http://www.ispot.org.uk/node/295772 2) largish (6"?) 'ramshorn' shell nr Cadiz + lge mass of 'flesh' attached http://www.ispot.org.uk/node/297049 3) small seaslug? (3 seen only 1 photo'd) she quotes rhinophores & gills but I can barely see rhinophore locn & gills no at all. http://www.ispot.org.uk/node/303788

ChrisMcA's picture

Martin I wonder if you could

Martin I wonder if you could clear up the riddle of http://www.ispot.org.uk/node/110992 where a mustard-yellow shell with radiating ridges (asit were 'milled'), i.e. the common banded wedge shell (Donax vittatus), was misID'd i.m.o. (+ 2others) as Donax-like Tellin (Moerella donacini). The netlinks & google images are sufficiently clear, but Tebble's british bivalves confirms it (only 1 has "radiating lines"), so the wonder is that 2 experts Id'd it so, & I suspect a slipup on the name. I say a riddle rather than dispute as there's been no response from the experts.