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Richard Ciffeli and others reported possible troodontid teeth from a Cenomanian-aged microvertebrate fossil site in Utah. The teeth are similar to those referred to the controversial genus Paronychodon. If these fossils really are troodontid, they might well be the oldest known occurrence of the family in North America. [13]
Troodontidae / t r oʊ. ə ˈ d ɒ n t ɪ d iː / is a clade of bird-like theropod dinosaurs from the Late Jurassic to Late Cretaceous.During most of the 20th century, troodontid fossils were few and incomplete and they have therefore been allied, at various times, with many dinosaurian lineages.
Troodon (/ ˈ t r oʊ. ə d ɒ n / TROH-ə-don; Troödon in older sources) is a former wastebasket taxon and a potentially dubious genus of relatively small, bird-like theropod dinosaurs definitively known from the Campanian age of the Late Cretaceous period (about 77 mya).
The oldest Archaeopteryx (Avialae) was found in the Solnhofen Limestone in Germany, [26] while the oldest evidence of Dromaeosauridae was unearthed in the Morrison Formation in North America. [27] Troodontidae continued to diversify and can be found in Asia, Europe and North America.
Fossils of Tawa-like dinosaurs have also been found in South America, which has important indications about paleogeography. During the Early Jurassic Period, dinosaurs such as Dilophosaurus, Anchisaurus, Coelophysis (formerly known as Megapnosaurus), and the early thyreophoran Scutellosaurus lived in North America.
North America: Canada: Newfoundland: Trilobites: McAbee Fossil Beds: Eocene: North America: Canada: British Columbia [Note 1] Plants, insects, and fish Melbourne Bone Bed: Pleistocene: North America: US: Florida: Megafauna, Hominin (the "Melbourne Man") Miguasha National Park: Devonian (Famennian) North America: Canada: Québec [Note 1 ...
Dinosaur Provincial Park is a UNESCO World Heritage Site situated 220 kilometres (137 mi) east of Calgary, Alberta, Canada; or 48 kilometres (30 mi) northeast of Brooks.. The park is situated in the Red Deer River valley, which is noted for its striking badland topography, and abundance of dinosaur fossils.
While Pectinodon is only known from teeth, its larger family Troodontidae is known from much more complete specimens. They were small, bird-like feathered bipedal maniraptorans with proportionally large eyes and brains. Like dromaeosaurids, they possessed a "sickle-claw" on the second toe of each foot. See the Troodontidae article for more ...