Allosauridae was a family of medium to large sized carnivorous theropod dinosaurs. Members included Saurophaganax, Allosaurus, and the poorly known Antrodemus, which could well be a specimen of Allosaurus. The Allosauridae family was named by prolific American paleontologist Othniel Charles Marsh in 1878. The exact number of genera that can be included here's very debatable and most of the upper Jurassic and Lower Cretaceous carnosaurs are somewhat closely related to Allosaurus. Whatever the ca… (More on Allosauridae)