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The Epic Interactive Encyclopedia 1998
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Epic Interactive Encyclopedia, The - 1998 Edition (1998)(Epic Marketing).iso
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Ceratosaurus
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1992-09-03
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Ceratosaurus
TIME: Late Jurassic
LOCALITY: North America (Colorado)
SIZE: 20 ft/6 m long
This is the dinosaur that gave its name to
the whole infraorder. The name means
"horned lizard," and refers to the low crest,
or horn, on its snout. There was also a pair
of bony ridges above the eyes.The function of
the horn remains a mystery, although various
suggestions have been put forward as to its
use. It could have been used for defense, but
it seems too small and not well placed for a
fight. Or it could have been for sexual
display, with only the males possessing it
and using it in the ritualistic, head-butting
battles probably engaged in to decide
hierarchy among the group.Ceratosaurus was
evidently an active predator. It had massive
jaws, armed with sharp, curved teeth. The
short arms had 4 powerful, clawed fingers and
the long legs had 3 clawed toes on each foot.
An unusual feature was a narrow row of bony
plates running down the center of its back
and tail giving the appearance of a serrated
crest. This could have been a device for
losing heat from the body, similar to the
back fin of Spinosaurus or the plates of
Stegosaurus.Footprints thought to be those of
Ceratosaurus have been preserved in the
dinosaur-rich rocks of the Morrison Formation
in the western USA. These ancient trackways
suggest that these dinosaurs moved in groups,
and maybe cooperated in packs to bring down
the larger dinosaurs.
Subject by: Russell Webb