Dinosaurs » A-Z Dinosaurs List » Allosaurus Dinosaur
Allosaurus Dinosaur (AL-oh-sore-us)
was a big carnivorous dinosaur with a length of up to 12 m
(39 ft).It was the most common huge predator in North America, 140
million years ago, in the Jurassic period.
Dinosaur is the official state fossil of Utah,
in the United States.
is a classic big theropod:
a big skull on a short neck, a long tail, and abridged forelimbs.
Its most distinctive feature is a pair of blunt horns just
above and in front of the eyes. Although short in assessment
to the hindlimbs, the forelimbs are massive and bear large,
eagle-like claws. The skull shows evidence of being self-possessed
of separate modules, which could be moved in relation to
one another, allowing big pieces of meat to be swallowed.
The skeleton of Allosaurus, like other theropods, shows
birdlike features similar to a wishbone and neck vertebrae
hollowed by air sacs. It is thought that Allosaurus might
have necessary in packs, allowing it to bring down the huge
sauropods of the time.
Dinosaur is the most general theropod in the huge
section of dinosaur-bearing rock in the American Southwest
known as the Morrison Formation. Remains have been improved
in Montana, Wyoming, South Dakota, Colorado, Oklahoma, New
Mexico, and Utah in the United States; and in Portugal.
Curiously, Allosaurus shared the Jurassic landscape with
several other theropods, including Ceratosaurus
and the massive Torvosaurus.
A famous fossil bed can be found in the
Cleveland Lloyd Quarry in Utah. This fossil bed contains
over 10,000 bones, mostly of Allosaurus, with other dinosaurs
like Stegosaurus and Ceratosaurus
thrown in. It is still a mystery how the bits and pieces
of so many animals can be found in one place: normally the
ratio of fossils of carnivorous animals over fossils of
plant eaters is very small. Conclusion like these can be
explained by pack hunting, although this is difficult to
One of the more
important finds was the 1991 discovery of "Big Al"
(MOR 593), a 95% comprehensive,
partially articulated, juvenile specimen that measured 8
meters (26 feet) in length. Nineteen bones were broken down
or showed signs of infection, which probably contributed
to Big Al's death. It was featured in the BBC's Walking with
Dinosaurs series in the "Ballad of Big Al".
The Museum of the Rockies and University of Wyoming Geological
Museum excavated the fossils near Shell, Wyoming. This skeleton
was at first discovered by a Swiss team led by Kirby Siber,which
later excavated a second Allosaurus "Big Al Two",
which is the best preserved skeleton of it's kind to date.
Classification and history of Allosaurus Dinosaur
The first Allosaurus
to be described was a "petrified horse hoof"
given to Ferdinand Vanpeer Hayden in 1869 by the populace
of Middle Park, near Granby, Colorado. It was really a
caudal vertebra (a tail bone), which Joseph Leidy
tentatively assigned first to the Poicilopleuron genus,
and later to a new genus, Antrodemus. However, it was Othniel
Charles Marsh who gave the formal name Allosaurus fragilis
to the genus and type species in 1877, based on much better
material counting a partial skeleton, from Garden Park,
north of Canon City, Colorado.
The name Allosaurus Dinosaurs
comes from the Greek allos, meaning "strange" or
"different"; and sauros,
meaning "lizard" or "reptile". The species
epithet fragilis is Latin for "fragile". Both refer
to lightening skin in the vertebrae.
It is unclear how
many species of Allosaurus Dinosaurs there were. The fabric from the
Cleveland-Lloyd Allosaurus is much smaller and more lightly
built than the huge, robust Allosaurus from Brigham Young University's
Dry Mesa Quarry. Fossils like Allosaurus have been described from Portugal.
Allosaurus's closest relative is probably
the Lower Cretaceous Acrocanthosaurus.
||Allosaurus Dinosaur (AL-oh-sore-us)|
||39 feet long and 12 feet tall
||It is unclear how many species of Allosaurus Dinosaurs there were. Fossils like Allosaurus have been described from Portugal. |
Allosaurus By DanielCohen
Description:Provides information on the physical characteristics, behavior, habits, and relatives of Allosaurus.
Allosaurus The Strange Lizard
Description:It specifically describes in graphic novel format the physical characteristics, eating habits, and survival techniques of Allosaurus. The book comprises of bewitching photos and graphics with vivid colors.
Allosaurus By Joanne mattern
Description:It describes about Allosaurus whose name means "the different lizard" because of its backbone, and the way it hunted and also tells as how scientists piece together facts about this creature and its world.
Allosaurus By Michael Goecke
Author:Michael P. Goecke
Description:It mainly describes the physical characteristics and behavior of the meat-eating Allosaurus.
|News of Allosaurus:|
Allosaurus Dinosaur for sale:
Allosaurus, was discovered in Wyoming, United States. The skeleton is 70% complete, and its size suggests it was a female. It is expected to sell at around $ 800,000.