New record of Ctenodus (osteichthyes: Dipnoi) from the Carboniferous of Montana

Abstract

A partial tooth plate of Ctenodus cf. C. interruptus from the uppermost Heath Formation (Chesterian, equivalent to Namurian E 2b), Montana, is described. This record extends the occurrence of Ctenodus to the western part of North America. Ctenodus species are common in Europe and have also been recorded from the eastern side of North America and from Australia.