Kosmoceras sp.

Kosmoceras sp.

This is a fossil ammonite from Middle Jurassic (Callovian), 165 million years ago, from Mikhaylov in the region of Ryazan, Russia. It seems to be some kind of Kosmoceras (Waagen 1869) but I’m not quite sure which species, it might be a Kosmoceras (S. Str.) baylei (Tintant 1963).