|Basic info||Taxonomic history||Classification||Relationships|
|Morphology||Ecology and taphonomy||External Literature Search||Age range and collections|
If no rank is listed, the taxon is considered an unranked clade in modern classifications. Ranks may be repeated or presented in the wrong order because authors working on different parts of the classification may disagree about how to rank taxa.
|B. R. Erickson 1987||Differs from Simeodosaurus lemoinei in having shorter snout, with broader base, muzzle only 1/3 total length of the skull, elongated lachrymal, skull roofing bones more extensive, postorbital-parietal contact extending far forward of supratemporal fenestra, and less tooth size differentiation. Vertebrae have distinctive features such as: greater length of centrum and neural arch of axis; and less development of ventral carina on all cervicals. The femur is proportionately lighter and longer|