ACANTHOPHOLIS
ACROCANTHOSAURUS
ADASAURUS
AEGYPTOSAURUS
AEOLOSAURUS
AFROVENATOR
AGILISAURUS
ALAMOSAURUS
ALBERTOSAURUS
ALECTROSAURUS
ALGOASAURUS
ALIORAMUS
ALLOSAURUS
ALTISPINAX
ALVAREZSAURUS
ALXASAURUS
AMARGASAURUS
AMMOSAURUS
AMTOSAURUS
AMYGDALODON
ANATOTITAN
ANCHICERATOPS
ANCHISAURUS
ANDESAURUS
ANKYLOSAURUS
ANSERIMIMUS
ANTARCTOSAURUS
ANTRODEMUS
APATOSAURUS
ARALOSAURUS
ARCHAEOPTERYX
ARCHAEORNITHOIDES
ARCHAEORNITHOMIMUS
ARGENTINOSAURUS
ARGYROSAURUS
ARRHINOCERATOPS
ATLASCOPCOSAURUS
AUBLYSODON
AUSTROSAURUS
AVACERATOPS
AVIMIMUS
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ANATOTITAN
Pronunciation:
uh-NAT-uh-TYE-tan 
Translation: Giant Duck
Also known as: Anatosaurus
Description: Herbivore, mostly Bipedal, semi-Quadrupedal
Order: Ornithischia
Suborder: Ornithopoda
Infraorder: Iguanodontia
Family: Hadrosauridae
Height: 13.1 -16.4 feet (4 - 5 meters)
Length: 29.5 - 39.4 feet (9 - 12 meters)
Weight: 6,600 - 8,800 lbs (3,000 - 4,000 kg)
Period: Late Cretaceous
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Notes: This hadrosaur, or duck-billed dinosaur, was one of the last of
the dinosaurs. Its most distinguishing feature was its unusually long and
wide duckbill, toothless over half its length -- making its head more duck-like
than most hadrosaurs.
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ANCHICERATOPS
Pronunciation:
ANG-kee-sair-a-tops
Translation: Similar Horned Face
Also known as:
Description: Herbivore, Quadrupedal
Order: Ornithischia
Suborder: Marginocephalia
Infraorder: Ceratopsia
Micro-order Neoceratopsia
Family: Ceratopsidae
Height: 7 feet (2.1 meters)
Length: 16 feet (4.9 meters)
Weight: Period: Late Cretaceous
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Notes: Anchiceratops was discovered in Alberta, Canada. Its massive head
was crowned by a horny beak and three horns. A long bony frill covered
its shoulders.
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ANCHISAURUS
Pronunciation:
ANG-kee-SAWR-us
Translation: Near Lizard
Also known as: Yaleosaurus
Description: Herbivore, Quadrupedal
Order: Saurischia
Suborder: Sauropodomorpha
Infraorder: Prosauropoda
Family: Anchisauridae
Height: 3 feet (0.9 meters)
Length: 7.5 feet (2.4 meters)
Weight: 60 lbs (27 kg)
Period: Early Jurassic
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Notes: Although discovered in Connecticut, Anchisaurus is believed to have
ranged all over the world. This small sauropod walked on all four feet,
but could stand on its hind feet when feeding. Its small slender head had
teeth made for shredding leaves.
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ANDESAURUS
Pronunciation:
AN-dee-SAWR-us
Translation: Andes (Mountains) Lizard
Also known as:
Description: Herbivore, Quadrupedal
Order: Saurischia
Suborder: Sauropodomorpha
Infraorder: Sauropoda
Family: Titanosauridae
Height:
Length: 59 feet (18 meters)
Weight:
Period: Middle Cretaceous
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Notes: Discovered in the Patagonia region of Argentina, Andesaurus resembles
Camarasaurus. Itsrear vertebrae are distinctive, being nearly 2 feet (.6
meters) high.
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ANKYLOSAURUS
Pronunciation:
ang-KILE-uh-SAWR-us
Translation: Fused Lizard
Also known as:
Description: Herbivore, Quadrupedal
Order: Ornithischia
Suborder: Thyreophora
Infraorder: Ankylosauria
Family: Ankylosauridae
Height: 11 feet (3.4 meters)
Length: 35 feet (10.6 meters)
Weight: 10,000 lbs (4,536 kg)
Period: Late Cretaceous
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Notes: The best known of the armored dinosaurs, Ankylosaurus was the last
and largest of the ankylosaurids. Its tough skin was covered with bony
plates, and it could swing its formidably clubbed tail to render a predator
lame. This dinosaur is known from fossils found in Montana and Alberta.
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ANSERIMIMUS
Pronunciation:
AN-sair-uh-MYE-mus
Translation: Goose Mimic
Also known as:
Description: Carnivore, Bipedal
Order: Saurischia
Suborder: Theropoda
Infraorder: Tetanurae
Superfamily: Ornithomimosauria (of the microorder Coelurosauria)
Family: Ornithomimidae
Height:
Length: 9.8 feet (3 meters)
Weight:
Period: Late Cretaceous
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Notes: Anserimimus was really more of an ostrich-mimic than a goose mimic,
as its name translates. Its powerful forelimbs were stronger than other
onithomimids. The arms and hands seem to indicate that Anserimimus dug
for such food as small insects or dinosaur eggs.
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ANTARCTOSAURUS
Pronunciation:
ant-ARK-tuh-SAWR-us
Translation: Southern Lizard
Also known as:
Description: Herbivore, Quadrupedal
Order: Saurischia
Suborder: Sauropodomorpha
Infraorder: Sauropoda
Family: Titanosauridae
Height: 20 feet (6.1 meters)
Length: 59 feet (18 meters)
Weight: 80,026 -100,000 lbs (36,300 - 45,360 kg)
Period: Late Cretaceous
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Notes: Found in both India and South America, Antarctosaurus is the largest
dinosaur known to have lived in the Southern Hemisphere. It is also one
of the few sauropods whose skull exists.
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ANTRODEMUS
Pronunciation:
an-tro-DEE-mus
Translation: Strongly Framed
Also known as: Allosaurus
Description: Carnivore, Bipedal
Order: Saurischia
Suborder: Theropoda
Infraorder: Tetanurae
Micro-order: Carnosauria
Family: Allosauridae
Height: 16.4 feet (5 meters)
Length: 39.3 feet (12 meters)
Weight: 8,000 lbs (3,630 kg)
Period: Late Jurassic
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Notes: Scientists debate whether Antrodemus and Allosaurus are the same
animal.
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APATOSAURUS
Pronunciation:
ah-PAT-uh-SAWR-us
Translation: Deceptive Lizard
Also known as: Brontosaurus; Atlantosaurus
Description: Herbivore, Quadrupedal
Order: Saurischia
Suborder: Sauropodomorpha
Infraorder: Sauropoda
Family: Diplodocidae
Height: 30 feet (9.1 meters)
Length: 75 feet (22.9 meters)
Weight: 66,000 lbs (29,937 kg)
Period: Late Jurassic
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Notes: Apatosaurus is one of the best known of all dinosaurs but usually
by its more popular name "Brontosaurus". Its 20-foot-long neck
supported a rather small head and its brain was about the size of a large
apple. Two low ridges ran the length of its backbone, from the base of
its skull almost to the tip of its tail. These spines supported the ligaments
that held up the neck and tail. Apatosaurus' 30-foot whip-like tail was
probably its only means of self-defense. This dinosaur lived in western
North America, where most specimens have been recovered.
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ARALOSAURUS
Pronunciation:
ar-al-uh-SAWR-us
Translation: Aral Lizard
Also known as:
Description: Herbivore, Bipedal
Order: Ornithischia
Suborder: Ornithopoda
Infraorder: Iguanodontia
Family: Hadrosauridae
Height:
Length:
Weight: Period: Late Cretaceous
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Notes: Fragmentary remains of Aralosaurus were discovered in Kazakhstan.
Very little is known of Aralosaurus; however, it did have different teeth
in the upper and lower jaws, which identify it as a hadrosaur.
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