- 학명 : Dilophosaurus sirensis
- 형태 : 골격화석 Skeleton
- 시대 : 전기쥐라기 Early Jurassic
- 크기 : 4.2m×1.5m×2.2m
- 원산지 : 중국 운남 Yunn
DILOPHOSAURUS("Double-crested Lizard")
ANATOMY
Dilophosaurus was a speedy, slender, bipedal (walked on two legs), meat-eater that lived during the early Jurassic period. It was a theropod (a meat-eating dinosaur) about 20 feet (6 m) long, about 5 feet (1.5 m) tall at the hip, and weighing about 650 to 1,000 pounds (300 kg to 450 kg).
It had two thin, bony, almost semi-circular crests on its head; these may have been for mating displays. It had short arms with three-fingered hands and strong legs with four-toed feet (one toe was a dewclaw ). Both fingers and toes had claws. It had hollow bones and an S-shaped, curved neck.
WHEN DILOPHOSAURUS LIVED
Dilophosaurus lived about 201 to 189 million years ago, during the early Jurassic period.
Among its contemporaries in
the meat-eaters Coelophysis (about 10 feet long), Syntarsus, and Segisaurus
the omnivores Massopondylus and Anchisaurus
the plant-eaters Scutellosaurus and Ammosaurus.
BEHAVIOR
Dilophosaurus may have roved in packs, since three specimens were found together in
DIET
Dilophosaurus was a carnivore, a meat eater. It had loosely attached jaws which would have made killing animals with its teeth difficult. It must have killed with its clawed arms and legs, and/or scavenged carcasses.
LOCOMOTION
Dilophosaurus walked on two muscular legs and was a relatively fast runner, leaving bird-like footprints on land. Some of its fossilized footprints are only impressions of the claw-tips. This indicates that Dilophosaurus may have been walking in water at the time. Dilophosaurus' leg length was about about 1.65 m; it's stride length (distance between footprints) was about 2.13 m.
DISCOVERY OF FOSSILS
The first fossil Dilophosaurus skeleton was found in
CLASSIFICATION
Dilophosaurus belonged to the:
Kingdom Animalia (animals)
Phylum Chordata (having a hollow nerve chord ending in a brain)
Class Archosauria (diapsids with socket-set teeth, etc.)
Order Saurischia - lizard-hipped dinosaurs
Suborder Theropoda - bipedal carnivores
Family Ceratosauria (also called Coelophysoidea - the most primitive theropod group, which includes Dilophosaurus and Segisaurus)
Genus Dilophosaurus
Species
D. wetherilli is the type species (named by Welles in 1954, but it was originally called Megalosaurus).