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  • Saurischia (theropods and sauropods)
  • †Herrerasaurians (early bipedal predators)
  • Theropods (all bipedal; most were carnivores)
  • †Coelophysoids (Coelophysis and close relatives)
  • †Ceratosaurians (Ceratosaurus and abelisaurids - the latter were important Late Cretaceous predators in southern continents)
  • †Spinosauroids (long bodies; short arms; some with crocodile-like skulls and bony "sails" on their backs)
  • †Carnosaurians (Allosaurus and close relatives, like Carcharodontosaurus)
  • Coelurosaurians (diverse, with a range of body sizes and niches)
  • †Tyrannosauroids (small to gigantic, often with reduced forelimbs)
  • †Ornithomimosaurians ("ostrich-mimics"; mostly toothless; carnivores to possible herbivores)
  • †Therizinosauroids (bipedal herbivores with large hand claws and small heads)
  • †Oviraptorosaurians (mostly toothless; their diet and lifestyle are uncertain)
  • †Dromaeosaurids (popularly known as "raptors"; bird-like carnivores)
  • †Troodontids (similar to dromaeosaurids, but more lightly built)
  • Avialans (flying dinosaurs, including modern birds: the only living dinosaurs)
  • †Sauropodomorphs (quadrupedal herbivores with small heads, long necks and tails, and elephant-like bodies)
  • †"Prosauropods" (early relatives of sauropods; small to quite large; some possibly omnivorous; bipeds and quadrupeds)
  • †Sauropods (very large, usually over 15 meters long [49 ft])
  • †Diplodocoids (skulls and tails elongated; teeth typically narrow and pencil-like)
  • †Macronarians (boxy skulls; spoon-shaped or pencil-shaped teeth)
  • †Brachiosaurids (very long necks; forelimbs longer than hindlimbs)
  • †Titanosaurians (diverse; stocky, with wide hips; most common in the Late Cretaceous of southern continents)
  • †Ornithischians (diverse bipedal and quadrupedal herbivores)
  • †Heterodontosaurids (meter- or yard-scale herbivores or omnivores with prominent canine teeth)
  • †Thyreophorans (armored dinosaurs; mostly quadrupeds)
  • †Ankylosaurians (scutes as primary armor; some had club-like tails)
  • †Stegosaurians (spikes and plates as primary armor)
  • †Ornithopods (diverse, from meter- or yard-scale bipeds to 12-meter (39 ft) animals that could move as both bipeds and quadrupeds; evolved a method of chewing using skull flexibility and large numbers of teeth)
  • †Hadrosaurids ("duckbilled dinosaurs")
  • †Pachycephalosaurians ("bone-heads"; bipeds with domed or knobby growth on skulls)
  • †Ceratopsians (dinosaurs with horns and frills, although most early forms had only the beginnings of these features)
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Is the Jurassic period a geologic time that followed the mass extinction of dinosaurs?

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In Jurassic Park book what did the dinosaurs depend on?

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What unit of geologic time followed the mass extinction of dinosaurs?

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What were the major geologic events in Jurassic time period?

The existence and extinction of the dinosaurs.


What kind of dinosaurs were in the Jurassic time descrilbe one of the dinosaurs?

Well the Jurassic was time of the giants. It was the Dinosaur's paradise. During this time oxygen levels were very high, which in turn super sized the herbivores. Sauropods like Brachiosaurus, Diplodocus, Camarosaurus etc., were almost invincible from predators because of there size. As for predators, well the main one was Allosaurus called the lion of the Jurassic. Allosaurus would have hunted in packs to kill sauropods.


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