Allosaurus

Allosaurus was a genus of large theropod from the Late Jurrasic period around 145 million years ago. they were the top predator of the time and place, even though not the largest.

study of its skull indicates that Allosaurus used it's upper jaws like a hatchet against prey.

Allosaurus' teeth were relativley small for a theropod of such size.

Allosaurus is one of the most famous dinosaurs, but has many names. such names are no longer valid, similar to the way Apatosaurus was once known as "Brontosaurus".

Allosaurus was first found of a fragment of vertebra found. it was named "diffrent lizard" because that vertabra was diffrent then all others known at that time.

Other names for allosaurus were "Labrosaurus" wich means "furious lizard" or "greedy lizard". Allosaurus was also once known as "Apatodon", "Creosaurus", "Antrodemus" and also "Epanterias" "Epanterias is almost certianly a giant specimen of Allosaurus Fragilis. it measures 40 ft 12 m.

another possible Allosaurus species is "Saurophaganax Maximus" or "Allosaurus Maximus"

The most common Allosaurus Species is Allosaurus Fragilis of north america.

another species of Allosaurus has also been found in Portugal, Tanzania, and possibly Australia.

Allosaurus was once discoverd by F. Hayden (Ferdinand) who sent it to famed Philidalphian paleontologist Joseph Leidy, who first assigned it to the genus of theropod Poekilopleuron, then later a new genus: "Antrodemus".

but prior to this Othniel Charles Marsh had created the genus Allosaurus and the family Allosauridae, but the genus and family was completly ignored untill the extensivley examined fossils from Clevland Lloyd Dinosaur quarry were assigned to the old genus Allosaurus.

2 Very well preserved specimins of Allosaurus Fragilis, one of wich was very detailed, are very famous. a BBC special was made about one of them, a young 26 foot long immature Allosaurus whos gender is probably male. this specimin was known as "Big Al"

a second Allosaur that was more complete then the first and Ironicly was discoverd by the same people who discoverd the first named it "Big Al Two" or as i like to call it "Big Allison".



Teeth mark on the giant sauropod Diplodocus, and a few on Apatosaurus, idicate Allosaurus may have hunted in packs, attacking sauropods much larger than itself. if Allosaurus did hunt alone, it would have attacked the young sauropods or the very sick.

Allosaurus had short brows, horns, or crests above its eyes. two distinct types, one oval shaped and smaller, another larger more pointed and modestly sloping.

As one of the most famous dinosaurs, Allosaurus was featured in many games, one of wich i have; Jurrasic Park: Operation Genisis

where the player has to move the dig teams to tanzania to dig up Allosaurus fossils. they are depicted as being social with eachother and fearing other large predators and are hunted by larger predators, in the same properties as the large carnivores hunt goats.