Revueltosaurus callenderi (Hunt 1989) Late Carnian, Late Triassic ~210mya, was first known from its teeth, which reminded Hunt (1989) of ornithischian dinosaurs. Parker et al. (2005) reidentified the remains as crocodylomorph. Here Revueltosaurus was derived from a sister to Osmolskina and Euparkeria. Fugusuchus and Tasmaniosaurus were sister taxa.
Distinct from Euparkeria, but like Fugusuchus, the skull of Revueltosaurus had drooping premaxilla, but on a very short rostrum. The antorbital fenestra is very small, but the fossa was enlarged. This sort of fenestra and fossa is also seen in a. The temple and cheek were robust. The teeth were small and coarsely serrated, like those of other herbivores of the period. The jaws were shorter and deeper. The upper temporal fenestra was larger, to house larger muscles for plant processing.
The neural spines were shorter. The anterior caudal spines leaned anteriorly. The posterior caudal spines were elongated and low. The coracoid was relatively larger. The pubis was a little deeper. The metatarsals were shorter and the toes were longer.
Ossified dermal armor covered much of the body to ward off attackers. |
