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Fossil identification help
Topic Started: Dec 7 2016, 05:01 PM (809 Views)
Hugo7
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Hello everyone!

I collected some fossils at school and I want to know what species they belong to.
All pictures are in the folder http://hugoland.fr/documents/TRT
(you can open them by clicking the lines that are not "Parent Directory")

Thanks in advance for your help! ;)
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HENDRIX
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I'd say you have sand dollars (flat sea urchins), several types of clams and part of an ammonite. I don't know the specific genera, though.
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Hugo7
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Thank you!
I forgot one fossil : http://hugoland.fr/documents/TRT/HNI_0006.JPG
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saurianne
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You've definitely got two different types of sand dollars. I think there's an echinoid directory somewhere online that can help you, but I really can't tell you much for the pictures other than that I'm pretty sure the paler ones are scutellines. If you can find the directory some other things that might help you id them are the number of gonopores (the little holes at the center of the "petals" on top), the size of the mouth and the distance between the mouth and the anus (assuming any of those fossils aren't covered in matrix on the bottom). The grey thing with the white streak looks more like an exogyra oyster to me but idk if you would expect to see that kind of thing in France or not. If it's from the same layer of soil as the sand dollars I can guarantee you it's not an ammonite, though.

I've seen fossil bark that looks kinda like that last one you posted, but if all this stuff is from the same fossil bed (and if so, the sand dollars are telling me it's a marine Cenozoic one) I can't begin to guess what it is.

Hope this helps!
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stargatedalek
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I'm not slow! That's just my moe!

It really doesn't look like an ammonite, perhaps a nautilus actually, but it's to "scoop-like" to be an ammonite.
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Hugo7
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Thanks!
Quote:
 
if all this stuff is from the same fossil bed
These are separate fossils my school wanted to get rid of, so some fossils came from different places.

Quote:
 
the paler ones are scutellines
You're right, and I heard that they were found in a Bajocian layer.
The paler ones might be Scutella paulensis

In my google searches, I accidentally found that the big sand dollar (the darker one) is a Clypeus ploti (Superior Bajocian).

Quote:
 
The grey thing with the white streak looks more like an exogyra oyster

Thanks, I had no idea for this one :)
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Hugo7
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Here is a better picture of one of my fossils :
http://hugoland.fr/documents/TRT/PC100283.JPG
What is this horizontal thing? Any idea, please? :)
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Monolophosaurus
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Looks like some sort of lace bryozoan. I don't know what type and I haven't seen any that look too much like that but it I think it probably is one.

The shell thing may even be a snail or nautilus, I doubt it's an ammonite. A shelled mollusk of some form for sure.
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Hugo7
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Sounds interesting, thanks! ;)
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Hugo7
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I uploaded a lot of pics on my last post, can you help me to identify the ones I don't know please?
http://thezt2roundtable.com/topic/30096514/1/#new
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HENDRIX
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The small "shells" under the belemnite pic are brachipods, and possibly the one above the belemnite as well. Brachiopod shells have some kind of opening at the end, so you can distinguish them from bivalvian molluscs in ideal cases.
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Hugo7
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Thanks! Unfortunately I don't see any hole, perhaps it's not an ideal case :/

btw I found these shells (under the belemnites) in bajocian stones
Edited by Hugo7, Feb 5 2017, 07:23 PM.
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HENDRIX
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Yeah, it rarely is. :P The wavy shape of the small ones is very characteristic of brachiopods.
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