Comobatrachus is a dubious genus of prehistoric frog erected by O. C. Marsh to house fragmentary remains recovered from Reed's Quarry 9 near Como Bluff Wyoming. Along with Eobatrachus it was among the earliest frog remains from the formation, although the two dubious genera were erected decades apart, with Comobatrachus being named second.
References
Comobatrachus Wikipedia(Text) CC BY-SA