Acanthodes bridgei

Acanthodes bridgei 

Acanthodian fish

Late Pennsylvanian

Marlin Quarry
Hamilton
Kansas

I believe this is a juvenile specimen as the squamation is only developed on less than half the length of the body and this is a pretty small specimen. The preservation on the fossil is amazing as the scales, spines and details of the head are beautifully preserved in high detail.

Specimen purchased from @connorp