Crocodylomorpha Walker 1968 [Clark 1988] see Subclass Crocodylomorpha Hay, 1930 Crocodyliformes Clark 1988 [Sereno, Larsson, Sidor & Gado 2001] Mesoeucrocodylia Whetstone & Whybrow 1983 [Sereno, Larsson, Sidor & Gado 2001] †Thalattosuchia Fraas, 1901 see Order Thalattosuchia Fraas, 1901 Genus †Steneosaurus Geoffroy, 1825