Lower Volgian fossils in European Russia are scarce (washed out), inflated ammonites are present in Orenburg and sometimes Ulyanovsk. They are from 3 ammonite zones defined by various species of Ilowaiskya (klimovi, sokolovi and pseudoscythica).
Middle Volgian is much more widespread, it's also divided into 3 zones, everybody here is familiar with: Dorsoplanites panderi, Virgatites virgatus and Epivirgatites nikitini.
Dorsoplanitidae family flourished during the Middle Volgian in the entire northern (boreal) area from Siberia to Greenland. As descendants of the Perishpinctidae family, dorsoplanitids retained their gigantism (30-40 cm is the normal size for many of their macroconchs). Two Dorsoplanitidae genera (Dorsoplanites and Pavlovia) dominated the 1st Middle Volgian (panderi) zone. Dorsoplanites also evolved into Lomonossovella and the latter - into Epivirgatites, the 2 genera that in turn dominated the last (nikitini) zone. The 2nd (virgatus) zone is defined by the genus Virgatites, derived from Ilowaiskya. Their characteristic feature are numerous ribs assembled in bundles.
Mid-Volgian ammonites are often massive and preserved as rough phosphorite and sandstone steinkerns. The bigger they are the less is the chance to see the inner whorls.
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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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