Silesauridae Nesbitt et al., 2010

Nesbitt, Sterling J., 2011, The Early Evolution Of Archosaurs: Relationships And The Origin Of Major Clades, Bulletin of the American Museum of Natural History 2011 (352), pp. 1-292 : 209

Silesauridae Nesbitt et al., 2010

DEFINITION: Stem: The most inclusive clade containing Silesaurus opolensis Dzik, 2003 , but not Passer domesticus Linnaeus, 1758 , Triceratops horridus Marsh (1889) , and Alligator mississippiensis Daudin, 1801 –1803.

TEMPORAL RANGE: Middle Triassic (Anisian, Asilisaurus kongwe ) to Late Triassic (Norian, Eucoelophysis baldwini Sullivan and Lucas, 1999 ).

SUPPORT: (1) Exits of the hypoglossal nerve (XII) nearly aligned in a near anteroposteriorly plane (113-1)*. (2) Rugose ridge on the anterolateral edges of the supraoccipital (127-1)*. (3) Cervical centra 3–5 longer than middorsal (181-1)*. (4) Notch ventral to the proximal head of the femur (304-1)*.

Other possible synapomorphies: AC- CTRAN: Ventral process of the squamosal narrower than one quarter of its length (56- 1); teeth fused to the bone of attachment at the base (174-0), unknown in Lewisuchus ; proximal articular surface of the humerus continuous with the deltopectoral crest (233- 0); pedal unguals dorsolaterally compressed (400-1), unknown in Lewisuchus . DEL- TRAN: Straight transverse groove on the proximal surface of the femur (314-1).