Some Pennsylvanian Chondrichthyan Spines from Nebraska

Authors

John G. Maisey, American Museum of Natural History

Date of this Version

1983

Comments

1983. Transactions of the Nebraska Academy of Sciences, XI:81-84. Copyright © 1983 Maisey

Abstract

Fragmentary, dermal spines of Pennsylvanian chondrichthyans from Cass and Sarpy counties, Nebraska, are described. Forms that have been identified include the genera Acondylacanthus, Amelacanthus, Bythiacanthus, and "Physonemus" and an indeterminate hybodont. A diverse chondrichthyan fauna is therefore represented by these spines. The record of Amelacanthus is the first outside Great Britain and Northern Ireland.