Dinosaurs Carnivorous.
All the carnivorous Dinosaur except the staurikosaurs; obligatory bipeds. Late Triassic to Late Cretaceous.
Infraorder Ceratosauria
Small to medium-size, hollow-boned carnivores. Late Triassic to Late Jurassic. Includes the primitive theropods such as Ceratosaurus , Coelophysis , and Syntarsus.
Infraorder Tetanurae
All other theropods are grouped here into the five subcategories Coelurosauria, Ornithomimosauria, Maniraptora (previously Deinonychosauria), Segnosauria, and Carnosauria. Late Triassic to Late Cretaceous.
Family Compsognathidae (Coelurosauria)
Advanced; smallest of the theropods; all known specimens 2-fingered. Name bearer is Compsognathus .
Family Oviraptoridae (Maniraptora)
Small, toothless theropods with an odd skull form; perhaps related to the ornithomimids. Oviraptor is the best-known example. Late Cretaceous.
Family Dromaeosauridae (Maniraptora)
Includes Deinonychus and Velociraptor . Early to Late Cretaceous.
Family Troodontidae (Maniraptora)
Less specialized in foot structure, but close to the dromaeosaurids. Name bearer is Troodon. Late Cretaceous.
Family Megalosauridae (Carnosauria)
Primitive large theropods; often 4-fingered. Megalosaurus is the best known. Early Jurassic to Late Cretaceous
Family Allosauridae (Carnosauria)
More advanced large theropods; all 3-fingered except for Ceratosaurus. Best known is Allosaurus . Late Jurassic to Late Cretaceous
Family Tyrannosauridae (Carnosauria)
Largest of the theropods and the most advanced; all with just 2 fingers. Examples are Tyrannosaurus, Tarbosaurus, and Albertosaurus . Late Cretaceous.
Order Ornithischia
The bird-hipped, herbivorous dinosaurs; characterized by the diagnostic predentary bone of the jaw.
Suborder Cerapoda
Facultatively bipedal ornithischian Dinosaur plus the horned ceratopsian forms. Late Triassic to Late Cretaceous.
Infraorder Ornithopoda
Family Fabrosauridae Earliest and most primitive of the ornithopods; small and often hollow-boned. Best known is Fabrosaurus. Late Triassic to Early Cretaceous
Family Heterodontosauridae
More advanced small ornithopods, with the beginnings of specialized dentition. Best examples are Heterodontosaurus and the primitive Pisanosaurus . Late Triassic to Late Jurassic.
Family Hypsilophodontidae
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Original Source - http://www.crystalinks.com/
Alternative Theory On Dinosaurs
Paleontology
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