The neck was elongated, expanding to a short torso and long tail. It had a massively built skull bearing dagger-like teeth. The length of the paratype is estimated up to 3.5–4 m (11–13 ft) long, while the holotype is estimated up to 5–6 m (16–20 ft) long it is suggested that Postosuchus may have reached lengths of 5–7 m (16–23 ft) long and even more based on a complete cervical series specimen (TTU-P 9235) from a very large individual. Adults reached around 1.2 m (3.9 ft) in height, 5 m (16 ft) in length from snout to tail tip and their mass might have ranged from 250 to 450 kg (550 to 990 lb). Postosuchus was one of the largest carnivorous reptiles during the late Triassic. The extreme shortness of the forelimbs relative to the hind limbs, the very small hands, and measurements of the vertebrae suggest that Postosuchus may have been committed to bipedal locomotion. It was a large animal up to 5–6 m (16–20 ft) long or even more. The skeleton of Postosuchus is large and robust with a deep skull and a long tail. It was a hunter which probably preyed on large bulky herbivores like dicynodonts and many other creatures smaller than itself (such as early dinosaurs). It was one of the apex predators of its area during the Triassic, larger than the small dinosaur predators of its time (such as Coelophysis). Its name refers to Post Quarry, a place in Texas where many fossils of the type species, P. Postosuchus is a member of the clade Pseudosuchia, the lineage of archosaurs that includes modern crocodilians (the other main group of archosaurs is Avemetatarsalia, the lineage that includes all archosaurs more closely related to birds than to crocodilians). alisonae, that lived in what is now North America during the Late Triassic. Postosuchus, meaning "Crocodile from Post", is an extinct genus of rauisuchid reptiles comprising two species, P.
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