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Nothosaurus

By Bob Strauss, About.com

A Nothosaurus skeleton (Wikimedia Commons

Name:

Nothosaurus (Greek for "false lizard"); pronounced no-tho-SORE-us

Habitat:

Oceans

Historical Period:

Triassic (250-210 million years ago)

Size and Weight:

About 10 feet long and 175 pounds

Diet:

Fish and shrimp

Distinguishing Characteristics:

Long, tapered body; narrow head with numerous teeth

About Nothosaurus:

With its webbed front and back feet, flexible knees and ankles, and long neck and tapered body--not to mention its numerous teeth--Nothosaurus must have been a formidable predator.

Because it bears some resemblance to modern seals, paleontologists speculate that Nothosaurus may have spent some of its time on land. It's clear that this aquatic reptile breathed air, as evidenced by the two nostrils on the top end of its snout, and although it was undoubtedly a sleek swimmer, it wasn't as well adapted to a full-time aquatic lifestyle as ichthyosaurs like Opthalmosaurus.

Whatever the case, it's clear that Nothosaurus was unusually well adapted to its environment, since this genus thrived in the oceans of the Triassic period for tens of millions of years.

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