Description

Middle Pennsylvanian
Stark Shale Member of Dennis Formation
Hansen Quarry, Papillion, Nebraska, USA
110mm complete fish on 200mm slab. Extremely rare from a site now under a housing complex.
Fish.

Chirodus is an early ray-finned fish.  It lived at a time after the placoderms had died out and large cartilaginous fishes had taken over the seas.

Complete fish of any kind are quite rare in the Stark Shale.  Most people found just isolated teeth and miscellaneous bits.