Allosaurid

Allosauridae Temporal range: Late Jurassic, 155–146.8 Ma PreЄ Є O S D C P T J K Pg N
An Allosaurus model
Scientific classification
Kingdom:	Animalia
Phylum:	Chordata
Class:	Reptilia
Clade:	Dinosauria
Order:	Saurischia
Suborder:	Theropoda
Clade:	†Allosauria
Family:	†Allosauridae Marsh, 1878
Type species
†Allosaurus fragilis Marsh, 1877
Genera
†Allosaurus †Saurophaganax †Epanterias
Synonyms
Antrodemidae Marsh, 1878 Labrosauridae Marsh, 1882

†Allosaurus
†Saurophaganax
†Epanterias

Antrodemidae Marsh, 1878
Labrosauridae Marsh, 1882

Allosauridae was a family of medium to large sized carnivorous theropod dinosaurs. Members included Saurophaganax, Allosaurus, and the poorly known Epanterias, which could well be a specimen of Allosaurus. Allosauridae was named by American paleontologist Othniel Charles Marsh in 1878.

The exact number of genera that can be included here is very debatable and most of the upper Jurassic and Lower Cretaceous carnosaurs are somewhat closely related to Allosaurus. Whatever the case, allosaurids seemed to be the most successful hunters of their times, outnumbering the Megalosauridae and Ceratosauridae, with which they competed for prey. The allosaurids would eventually be succeeded by their close relatives the carcharodontosaurs in the southern hemisphere, and replaced by the coelurosaurian tyrannosaurids in the northern hemisphere, during the Cretaceous Period.