Aspects of Permian palaeobotany and palynology. XV. On the oldest known peltasperms with radially symmetrical ovuliferous discs from the Kungurian (uppermost Lower Permian) of the Fore-Urals (Russia)
Author:
Serge V. Naugolnykh,Hans Kerp
Publication:
Review of Palaeobotany and Palynology
Copyright © 1996 Published by Elsevier B.V.