1. Education
You can opt-out at any time. Please refer to our privacy policy for contact information.




Ammosaurus (Heinrich Harder)


Ammosaurus (Greek for "sandy lizard"); pronounced AM-moe-SORE-us


Woodlands of eastern North America

Historical Period:

Early Jurassic (190-175 million years ago)

Size and Weight:

About 8 feet long and a few hundred pounds



Distinguishing Characteristics:

Relatively small size; slender build


About Ammosaurus:

In the eyes of most paleontologists, Ammosaurus is one of those "almost, but not quite" dinosaurs of the early Jurassic period. Originally named by the famous paleontologist Othniel C. Marsh (the Greek word "ammo" means "sandy" and has nothing to do with ammunition), this prosauropod may or may not have been a specimen (or possibly a slightly larger species) of the more famous Anchisaurus. Whatever the case, Ammosaurus is one of the few dinosaurs to have been unearthed in modern-day Connecticut, which is more famous for its dinosaur footprints than its dinosaur fossils.

©2014 About.com. All rights reserved.