Echinoderms in question do not get preserved apart from isolated fragments and spines which are in turn abundant in some locations. For example, echinoid spines are numerous in Fili Park of Moscow, but their tests are impossible to find. Crinoid stem fragments are large in Callovian/Oxfordian (calyx still unknown) but get tiny in the late Volgian turning almost invisible. Callyxes and complete specimens are yet to be found in the region. Known genera:
echinoids: Echinobrissus, Holectypus, Plegiocidaris, Rhabdocidaris;
crinoids: Cyclocrinus , Pentacrinus;
starfish: Goniaster, Geocoma.
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Image Comments
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By jpc · Posted
This is a piece of the plastron of a soft-shelled turtle. Nice find.
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By icycatelf · Posted
After doing some research, I'm under the impression that this is Gastrioceras sp. Not sure how to go about updating the post though.
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By M3gal0don_M4n · Posted
Actually one of the coolest teeth I have seen! Great find.
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By citronkitten · Posted
OR Sylvestrilamia teretidens based on crown extending out to cusplets
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By citronkitten · Posted
OR Sylvestrilamia teretidens based on crown extending out to cusplets?
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By bthemoose · Posted
@Fin Lover, this ID is based on input that @siteseer provided here:
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By Fin Lover · Posted
Based on the enamel "shelf" on the labial side, I would have IDed this as a retroflexus. May I ask what features indicate desori?
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By Samurai · Posted
Oh! I am so sorry for the late reply as I never got the notification. Sadly I have not, besides a familial (mostly superficial) resemblence to the modern ratfish (probably from the same diet) I have not gotten any clear answers.
Jokes aside, a true Id may never come unless far into the future. I still have hope one day someone can help with this ID.
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