The Morrison Formation - Fossil Ecosystems of North America: A Guide to the Sites and their Extraordinary Biotas - page 147

long, with jaws supporting 70 curved and
sharp teeth. It is thought to have hunted in
groups when attacking herds of sauropods.
The feet supported three ferociously large
claws used for tearing flesh.

but slimly built and weighing only around
10-12 tons ( 150 - 152 ). Both the neck
and the tail were held more or less
horizontally. The 6 m (20 ft) long neck
supported a tiny skull compared to the size
of the animal, while the long tail with 73
vertebrae could be used like a whiplash.
Recent fossil evidence suggests that it
possessed a dorsal crest of

Diplodocus
This is a plant-eating sauropod described
by Marsh, and is one of the longest
dinosaurs known, up to 27 m (90 ft),

triangular

spikes, like a modern Iguana .

150

150 The sauropod dinosaur Diplodocus; note the whip-like tail AMNH. Length up to
27 m 90 ft.