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




Segisaurus (Nobu Tamura)


Segisaurus (Greek for "Tsegi Canyon lizard"); pronounced seh-gih-SORE-us


Woodlands of North America

Historical Period:

Early-Middle Jurassic (185-175 million years ago)

Size and Weight:

About 3 feet long and 15 pounds



Distinguishing Characteristics:

Small size; strong arms and hands; bipedal posture


About Segisaurus:

Unlike its close relative, Coelophysis, fossils of which have been found by the boatload in New Mexico, Segisaurus is known by a single, incomplete skeleton, the only dinosaur remains ever unearthed in Arizona's Tsegi Canyon. Most experts agree that this early theropod pursued a carnivorous diet, though it may have feasted on insects as well as small reptiles and/or mammals. Also, the arms and hands of Segisaurus appear to have been stronger than those of comparable theropods, further evidence for its meat-eating proclivities.

©2014 About.com. All rights reserved.