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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).
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.
Holtz found that troodontids were the sister group to the ornithomimosaurs. [2] Catherine Forster and others found that troodontids were the sister group of the avialans. [2] Sereno defined the Troodontidae as all taxa more closely related to Troodon formosus than to Velociraptor mongoliensis. [14] 1999
A model of the hypothetical Dinosauroid, Dinosaur Museum, Dorchester. In 1982, Dale A. Russell, then curator of vertebrate fossils at the National Museum of Canada in Ottawa, conjectured a possible evolutionary path for Stenonychosaurus, if it had not perished in the Cretaceous–Paleogene extinction event, suggesting that it could have evolved into intelligent beings similar in body plan to ...
By the Late Cretaceous, Paraves reached global distribution with fossils found in modern Asia, Europe, Australia, Antarctica etc. [7] Almost all Paravian dinosaurs died out before or during the end-Cretaceous mass extinction (~66 million years ago), also called the Cretaceous-Paleogene (K-Pg) mass extinction. [8] [9] [10]
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.
Burgess Shale fossils (1 C, 137 P) C. Canadian amber (9 P) F. Fossils of British Columbia (6 C, 49 P) M. Fossil museums in Canada (2 C, 6 P) Pages in category ...