Outline: a typical early sauropodomorph

Portland Fm., ConnecticutNamed 1885

Anchisaurus

ANG-kee-SORE-us

"near lizard"

Type species Anchisaurus polyzelus

Lived
201 to 193 million years ago, Early Jurassic
Length
about 2 m (7 ft)
Group
Early sauropodomorphs
Found in
United States
Named by
Marsh 1885

Size comparison

To scale

Where its fossils were found

The evidence

Today

5 finds

195 million years ago

Map: C. R. Scotese, PALEOMAP

Field notes

About Anchisaurus

What it was like

Anchisaurus was a small, lightly built plant eater about 2 meters (7 feet) long. It belonged to the early relatives of the giant sauropods, but it was tiny by comparison, with a long neck, a small head and a long tail. Its hands carried a large thumb claw.

Its world

It lived about 201 to 193 million years ago, in the Early Jurassic, in what is now Connecticut and Massachusetts in the United States. Its bones come from the red sandstones of the Portland Formation, laid down in a rift valley with lakes and rivers.

How it was found

Marsh gave it the name Anchisaurus in 1885, after two earlier names turned out to be taken by other animals. The type species is Anchisaurus polyzelus. Bones of this kind were among the first dinosaur fossils found in North America, dug up long before the word dinosaur existed.

Lived alongside

Found in the same rock formations

Close relatives

Other members of Massopoda

Sources: WikidataNamed in: O. C. Marsh. 1885. Names of extinct reptiles. American Journal of Science 29:169