[Crurotarsi] Sereno & Arcucci 1990
   1 Parasuchia Huxley, 1875
   2.1 †"rauisuchians" Bonaparte, 1982 - rauisuchians
   2.2 †Aetosauria Marsh 1884 [Heckert & Lucas 2000] see Order Aetosauria Nicholson & Lydekker, 1889
   2.3 Crocodylomorpha Walker 1968 [Clark 1988] see Subclass Crocodylomorpha Hay, 1930