Dromaeosaurus and Hell Creek Formation

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Difference between Dromaeosaurus and Hell Creek Formation

Dromaeosaurus vs. Hell Creek Formation

Dromaeosaurus ("swift running lizard") is a genus of theropod dinosaur which lived during the Late Cretaceous period (middle late Campanian), sometime between 76.5 and 74.8 million years ago, in the western United States and Alberta, Canada. The Hell Creek Formation is an intensively-studied division of mostly Upper Cretaceous and some lower Paleocene rocks in North America, named for exposures studied along Hell Creek, near Jordan, Montana.

Alvarezsauridae

Alvarezsauridae is a group of small, long-legged dinosaurs.

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Dakotaraptor

Dakotaraptor is a genus of large carnivorous dromaeosaurid theropod from the Late Cretaceous of North America.

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Dinosaur

Dinosaurs are a diverse group of reptiles of the clade Dinosauria.

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Dromaeosauridae

Dromaeosauridae is a family of feathered theropod dinosaurs.

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Genus

A genus (genera) is a taxonomic rank used in the biological classification of living and fossil organisms, as well as viruses, in biology.

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Holotype

A holotype is a single physical example (or illustration) of an organism, known to have been used when the species (or lower-ranked taxon) was formally described.

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Lance Formation

The Lance (Creek) Formation is a division of Late Cretaceous (dating to about 69 - 66 Ma) rocks in the western United States.

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Late Cretaceous

The Late Cretaceous (100.5–66 Ma) is the younger of two epochs into which the Cretaceous period is divided in the geologic timescale.

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Maastrichtian

The Maastrichtian is, in the ICS geologic timescale, the latest age (uppermost stage) of the Late Cretaceous epoch or Upper Cretaceous series, the Cretaceous period or system, and of the Mesozoic era or erathem.

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Montana

Montana is a state in the Northwestern United States.

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Saurornitholestes

Saurornitholestes ("lizard-bird thief") is a genus of carnivorous dromaeosaurid theropod dinosaur from the late Cretaceous of Alberta, Montana, New Mexico, Alabama, North Carolina, and South Carolina.

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Theropoda

Theropoda (or, from Greek θηρίον "wild beast" and πούς, ποδός "foot") or theropods are a dinosaur suborder characterized by hollow bones and three-toed limbs.

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Troodon

Troodon (Troödon in older sources) is a dubious genus of relatively small, bird-like dinosaurs known definitively from the Campanian age of the Cretaceous period (about 77 mya).

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Tyrannosauridae

Tyrannosauridae (or tyrannosaurids, meaning "tyrant lizards") is a family of coelurosaurian theropod dinosaurs that comprises two subfamilies containing up to thirteen genera, including the eponymous Tyrannosaurus.

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Velociraptorinae

Velociraptorinae is a subfamily of the theropod group Dromaeosauridae.

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