This section is taken from the Dinosaur Field Guide.
- "Lot number 2, ladies and gentlemen, a juvenile Allosaurus. A fierce and aggressive predator."
- —Gunnar Eversol introducing a juvenile Allosaurus to auctioneers(src)
Allosaurus (meaning "different lizard") was the most common predator of the Late Jurassic period and among the most dangerous. Like most theropod dinosaurs, its jaws were filled with serrated teeth shaped like blades. Computer studies suggest that Allosaurus attacked by using its upper jaw like a machete to hack at its victim, then it used its lower jaw to bite out a slice of meat, although recent studies have proven this unlikely. In terms of size, it was the third-largest theropod of its era, only the likes of the megalosaurid Torvosaurus (10-11 meters or 33-36 feet with 4-5 tons of weight behind it) and Saurophaganax (12-13 meters or 39-43 feet with 6 tons of weight behind it) exceeded it in size and weight. It averaged around 8.5 meters long (28 feet) and around 3 meters (10 feet) tall. However fragmentary remains suggest larger lengths of 11 to 12 meters (36-39 feet), though its weight would be less than the Saurophaganax, which was the heavyweight theropod of the Jurassic.
It might have been easy for an Allosaurus to kill a fairly defenceless dinosaur-like Camptosaurus, but Stegosaurus could certainly fight back with a blow from its tail. Thus it is thought that the Allosaurus hunted in large hunting gangs, similar to that of the Komodo dragon. While this means they hunted 'together', it was still every Allosaurus for itself. Often at times, an entire gang of these dinosaurs would be killed by their prey or by natural hazards, showing they had poor group coordination.
It is known that Allosaurus led a dangerous life. The Allosaurus on display at the Smithsonian Institute has a smashed shoulder blade, several broken ribs, and a lower jaw so damaged that paleontologists didn't realize it was an Allosaurus jaw for over 100 years. But these were tough dinosaurs: Their bones show that they likely lived long enough for their wounds to heal.
In the early 1990s, InGen had completed 12% of the Allosaurus genome for exhibition in the original Jurassic Park on Isla Nublar, but this completion of its DNA sequencing had to be put on hold due to InGen's financial trouble. The sequencing of its DNA would eventually be finished by the time that Jurassic World opened up to the public.
It is revealed that there are surviving Allosaurus populations remaining on Isla Nublar after the 2015 Incident, but will now face an impending danger, alongside many other creatures, in the form of an erupting volcano.
Interestingly, unlike the rest of InGen's cloned theropods, the wrists of the adult Allosaurus are not pronated, though juveniles do have pronated wrists. It has a thicker head than in real life, and it was slightly oversized, being 10.4 meters (34 feet) instead of 9.7 meters (32 feet). Adults have exaggerated crests and spines running down their backs. The Allosaurus clones as adults are mostly dark greyish blue with a yellow underbelly, and a blue tongue while the juveniles are mostly dark blueish-grey with yellow underbellies, yellow stripes on the face and neck, a yellow circle around its eye orbit, white markings, and faded red on their crests.
At least five other Allosaurus are later captured by Ken Wheatley and his men and are taken off of the doomed island to Lockwood Manor, where they are auctioned off to the highest bidder by Eli Mills and Gunnar Eversol. During the auction, a juvenile is bought by a wealthy client. The remaining Allosaurus are later seen running free in a stampede with other dinosaurs to escape the estate, while the juvenile that was bought at the auction is last seen in a truck being shipped off to its buyer.
One year after the dinosaurs’ escape from Lockwood Manor, one of the juvenile Allosaurus has fully matured and taken up residence in Big Rock National Park. It attacked a family of Nasutoceratops that were foraging at a camping ground, only to turn its interest on a family of campers in an RV. The Allosaurus destroyed the RV, but was scared off when Kadasha fired two crossbow bolts into its face.
- In Jurassic Park III, an illustration of an Allosaurus skull was seen on the Montana State University logo. This is strange because the dinosaur has never served as the university's mascot in any capacity.
Jurassic Park: Dangerous Games
Allosaurus was one of the dinosaurs created by InGen for Jurassic Park in the comic series Jurassic Park: Dangerous Games. After the Isla Nublar Incident it became a wild species like most of the dinosaurs.
Two more Allosaurus later appear towards the end of Espinoza's mission. The pair attempt to chase his dirtbike and kill him, but the agent is able to escape from the dinosaurs and catches his helicopter to escape the island, with the dinosaurs watching him depart.
- Jurassic Park: Builder states that Allosaurus is one of John Hammond's favourite dinosaurs.
- Allosaurus appears on one variant of the cover of The Lost World despite its absence in the book.
- In early CGI production of the dinosaur stampede during the pyroclastic flow in Jurassic World: Fallen Kingdom, the Allosaurus present was going to have a much different death. Instead of being hit by a volcanic rock, it was originally going to show the dinosaur attempting to ambush a juvenile Triceratops before being gored to death by the infant's mother.
- In Battle at Big Rock, the adult Allosaurus is seen to have supinated wrists instead of pronated wrists, but the GEN 2 Allosaurus, based on the short film model, from Jurassic World: Alive, has pronated wrists, as well as the concept art for the film model. It is unknown if the adult Allosaurus can pronate its wrists.
- The Allosaurus in Battle at Big Rock was based on the species Allosaurus jimmadseni.
- The Battle at Big Rock design also bears a suspiciously strong resemblance to the Papo Allosaurus figurine, sporting a similar color scheme as well as the same dorsal spine arrangement.
- According to an ILM digital model production chart for Jurassic World: Fallen Kingdom, female Allosaurus grow noticeably larger than males, achieving a size on par with the average Tyrannosaurus rex.
|Jurassic World: Fallen Kingdom Dinosaurs|
|Allosaurus • Ankylosaurus • Apatosaurus • Baryonyx • Brachiosaurus • Carnotaurus • Compsognathus • Gallimimus • Indoraptor • Mosasaurus • Parasaurolophus • Pteranodon • Sinoceratops • Stegosaurus • Stygimoloch • Triceratops • Tyrannosaurus rex • Velociraptor|
|Battle at Big Rock Dinosaurs|
|Allosaurus • Compsognathus • Mosasaurus • Nasutoceratops • Parasaurolophus • Pteranodon • Stegosaurus|