Eureptilia includes not only all Diapsids, but also a number of primitive Permo-Carboniferous forms previously classified under the Anapsida, in the old (no longer recognised) order "Cotylosauria".
Eureptilia obuhvata ne samo sve diapside, nego i brojne primitivne permo-karboniferne forme koje su ranije bile klasifikovane kao Anapsida, u starom (više ne korištenom) redu Cotylosauria.