Pteraster Müller and Troschel, 1842

Pterasteridae having muscle bands in the supradorsal membrane, but these as a rule not regularly reticulated; adambulacral armature in the form of transverse webbed combs; actinolateral spines forming a free, independent lateral fringe, not merged in actinal floor; supradorsal membrane frequently (but not invariably) with small spiracula.