This is a good preserved and quite large ammonite of the species art Kosmoceras (Lobokosmoceras) proniae from the middle Jurrasic of Michailov, Russian. | |||
Location: | Michailov, Ryazon Region, Russian | ||
| Size: | about 55 mm | ||
| Age: | Upper Jurasic Jura, Callovian, (ca. 160 Ma) | ||