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| cthirion |
Posted on 29-04-2010 23:22
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Member Location: Posts: 901 Joined: 13.08.04 |
Unknown Fixed on sediments 2cm, B/ Lac de la Plate Taille, barrage Eau d'Heure P.Bouxin photo Edited by cthirion on 30-04-2010 10:41 cthirion |
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| Tony Irwin |
Posted on 29-04-2010 23:32
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 Member Location: Posts: 7168 Joined: 19.11.04 |
photo??
Tony ---------- Tony Irwin |
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| cthirion |
Posted on 30-04-2010 15:37
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Member Location: Posts: 901 Joined: 13.08.04 |
I asked Tony to insert the photograph but it misses, I asked Paul, that then does not pass from at home! A little patience! Camille cthirion |
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| Paul Beuk |
Posted on 30-04-2010 17:23
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 Super Administrator Location: Posts: 19208 Joined: 11.05.04 |
No wonder it did not attach: illegal characters in the filename and a whole bunch of spaces!
Paul - - - - Paul Beuk on https://diptera.info |
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| cthirion |
Posted on 30-04-2010 19:33
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Member Location: Posts: 901 Joined: 13.08.04 |
Thanks Paul! Camille cthirion |
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| atylotus |
Posted on 01-05-2010 10:05
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 Member Location: Posts: 1112 Joined: 29.05.09 |
The locality (lac/lake) suggests that you have photographed it in aquatic or at least a wet habitat. The white part with the black spots, reminds me of a snail of the genus Radix. But if this is true, the snail is already dead or dying and not within the shell. The yelly, striped part looks more like a Hydrozoa. This means, that I don't know for sure. Will you let me know if it could be aquatic? |
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| cthirion |
Posted on 02-05-2010 22:29
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Member Location: Posts: 901 Joined: 13.08.04 |
Yes, it was posed on fixed sediments, was observed in diving! Several between 6 and 20 m of depth, resemble a mussel without shell. Thanks! Camille Edited by cthirion on 02-05-2010 22:31 cthirion |
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| cthirion |
Posted on 05-05-2010 15:40
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Member Location: Posts: 901 Joined: 13.08.04 |
Nobody to specify, please?
cthirion |
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| atylotus |
Posted on 05-05-2010 18:41
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Member Location: Posts: 1112 Joined: 29.05.09 |
There are no freshwater bivalves with these kind op pigmentspots. I have seen this only in the genus Radix, a freshwater gastropod. You can see the pigmentspots on the mantle of the body at the leftside of your specimen. At the top it seems as if you photographed the actual head, which is entirely white. At the right hand side you'll notice the brown remains of the posterior body with undigested material in the intestine. The posterior body is retracted within the (missing) shell and is softer than the anterior part with the head, which is more or less outside the shell (when living). I'm not sure which Radix species it is for the shell is missing and I'm not quit sure if it is actually the head at the top. If the head is unpigmented, then it must be Radix balthica, if the head has small blackish pigmentspots then it is R. auricularia. The edge of the mantle (which is the thick line between the pigmentspots on the mantle and the jelly part at the lower part of the photo) is unpigmented as well as the head (?) so Radix balthica is most likely. In R. auricularia the edge of the mantle has a row of multiple blackish spots. I have no idea what this jelly striped material is at the bottom. |
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| cthirion |
Posted on 06-05-2010 15:36
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Member Location: Posts: 901 Joined: 13.08.04 |
Thank you from P.Bouxin and C.Thirion!
cthirion |
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| Tony Irwin |
Posted on 12-05-2010 11:38
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Member Location: Posts: 7168 Joined: 19.11.04 |
It looks like a bird dropping to me! 
Tony ---------- Tony Irwin |
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