Eugeneodus

Eugeneodus is an extinct genus of eugeneodontid cartilaginous fish from the Carboniferous of North America. A single species, E. richardsoni, is known, and both its genus and species name honor paleontologist Eugene S. Richardson Jr. It is differentiated from its close relatives by the unfused nature of the neural and haemal arches in its caudal fin and the anatomy of its flattened, rectangular teeth (termed pavement teeth). It is the type genus of the order Eugeneodontiformes.