Segisaurus

Type Species: Segisaurus halli

Classification: Dinosauria – Saurischia – Theropoda – Coelophysoidae - Coelophysidae

Time Period: Early Jurassic

Location: North America

Diet: Carnivore

Segisaurus is known from a single sub-adult specimen from Arizona. The specimen discovered was just under three and a half feet long and would’ve stood just over one and a half feet tall at the hips. It was nimble and likely preyed upon insects, lizards, and small mammals (and there’s no reason to think it wouldn’t scavenge when the opportunity presented itself). Segisaurus had a flexible, elongated neck and stout body; its powerful legs were crowned with three-toed feet; and it had a long tail and long forearms. Segisaurus is remarkable for the fact that it seems to have had clavicles, which are unknown in other theropods from that era. This find demonstrates that the clavicle was primitively present in early theropods and reinforces the theory that modern birds are descended from theropod dinosaurs.