Abstract:
A new ammonoid species of the family Neocomitidae is discovered in the Riasanites rjasanensis zone of the Ryazaman Stage (Berriasian) in the course of the study of the Jurassic-Cretaceous boundary beds in the Russian Platform. The family Neocomitidae is important for the correlation of the Jurassic-Cretaceous boundary beds of the Boreal and Mediterranean Realms. A brief account of the central Russian representatives of the Neocom1t1dae 1s given and Subalpinites? krischtafowitschi sp. nov. is described.
