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- Coelophysis
- TIME: Late Triassic
- LOCALITY: North America (Connecticut and
- New Mexico)
- SIZE: 8-10 ft/2.4-3 m long
-
- The appearance of this comparatively large
- ceratosaur is well known from a find made
- in 1947 at Ghost Ranch in New Mexico.
- Here, a number of skeletons were
- massed together, about a dozen of them being
- complete. These included some very young
- individuals 3 ft/1 m in length, as well as
- adults up to 10 ft/3 m. Finding all these
- animals together in one spot suggests that
- they lived as a group, and were all overcome
- at the same time.This early dinosaur must
- have been a ferocious hunter--it was built
- for speed. Its slender, hollow-boned body
- probably weighed less than 50 lb/23 kg. The
- neck, tail and legs were long and slim, the
- tail making up about half the body length.
- The long, narrow head was armed with many
- sharp teeth, each with a cutting, serrated
- edge. The birdlike feet had 3 walking toes
- with sharp claws. There were 4 fingers on
- each hand, though only 3 were strong enough
- to grasp prey.It is thought that Coelophysis
- roamed the upland forests, hunting in packs
- close to streams and lakes. Among their prey
- would have been the small, shrewlike mammals
- that had evolved towards the end of the
- Triassic period.Two of the adult skeletons
- found in New Mexico contained the bones of
- tiny Coelophysis in their body cavities.
- Initially, paleontologists thought that this
- suggested Coelophysis gave birth to live
- young, rather than laying eggs like most
- other reptiles. But the opening through the
- pelvis proved too narrow for this to have
- been possible. The conclusion seems to be
- that this dinosaur was cannibalistic.
-
- Subject by: Russell Webb
-