Illustration board

Master RGB File:
1,498 pixels (5.0") high
4,467 pixels (14.9") wide
300 dpi resolution
19.1 Mb uncompressed

Image Use


Seismosaurus was not the heaviest dinosaur, but it may have been the longest land animal that has ever lived. It stretched almost one hundred and twenty feet from tail-tip to snout and weighed almost as much as fifteen full-grown African elephants. Surely this creature shook the earth as it lumbered across the ancient terrain.

Vital Statistics

Genus Name: Seismosaurus ("earth shaker lizard")
Type Species: * S. hallorum (Gillette, 1991)
Length: about 120 feet (37 meters)
Weight: 30-70 tons
Time: 155-145 million years ago (Late Jurassic)
Place: New Mexico
Diet: plant-eater (herbivore)

All images are protected by copyright. Permission to reproduce any image must be obtained by writing to: Please see our Image Use page for more information.