Hesperosuchus agilis (Colbert 1952) Late Carnian, Late Triassic ~210mya, was derived from a sister to SMNS 12352 and it phylogenetically preceded Yonghesuchus.
Distinct from Sphenosuchus, the skull of Hesperosuchus had more robust bones creating a smaller orbit and lateral temporal fenestra along with a deeper cheek. The premaxilla had a "shark-nose" shape.
Hearkening back to Gracilisuchus, the dorsal ribs had intercostal plates.
In size and shape the scapula and coracoid resembled those of Saltoposuchus, but the forelimbs were longer as in Terrestrisuchus. The hind limbs were similar to those of Saltoposuchus, but the femur was relatively shorter. |
