who discovered it?
Ferdinand Vandeveer Hayden
Allosaurus
The first described fossil in this history was a bone obtained secondhand by Ferdinand Vandeveer Hayden in 1869
how many years ago did the allosaurus exist? 155 to 145 million years ago which period was that? The late Jurassic period describe this creature's physical features It was a typical large theropod, having a massive skull on a short neck, a long, slightly sloping tail and reduced forelimbs. was it a herbivore, carnivore or omnivore? Carnivore did it give birth to the young one or did it lay eggs? Lay eggs in which region were their fossils discovered? The Morrison Formation of Garden Park, north of Cañon City
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Allosaurus [SEP] Early discoveries and research
The discovery and early study of "Allosaurus" is complicated by the multiplicity of names coined during the Bone Wars of the late 19th century. The first described fossil in this history was a bone obtained secondhand by Ferdinand Vandeveer Hayden in 1869. It came from Middle Park, near Granby, Colorado, probably from Morrison Formation rocks. The locals had identified such bones as "petrified horse hoofs". Hayden sent his specimen to Joseph Leidy, who identified it as half of a tail vertebra, and tentatively assigned it to the European dinosaur genus "Poekilopleuron" as "Poicilopleuron" "valens". He later decided it deserved its own genus, "Antrodemus".