Abelisaurus
"Abel's lizard" has been reconstructed from a single skull.

Achillobator
This fierce raptor was discovered in modern-day Mongolia.

Acrocanthosaurus
The largest predator of the early Cretaceous period.

Adasaurus
This raptor's hind claws were unusually small.

Aerosteon
This "air-boned" dinosaur may have breathed like a bird.

Afrovenator
One of the few carnivores ever to be dug up in north Africa.

Albertonykus
A tiny, birdlike, North American dinosaur.

Albertosaurus
This carnivore was a close cousin of T. Rex.

Alectrosaurus
Few specimens of this "unmarried lizard" have been found.


Alioramus
All we know...