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Nesov described the new species Troodon asiamericanus. [6] Troodon eggs continued to attract scholarly attention in the 1990s. 1996. Darla Zelenitsky and Leonard Hills described the eggs of Troodon formosus. They found that the surface of Troodon eggs were smooth and their pores occurred singly or in pairs. When viewed in thin section, the ...
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). It includes at least one species, Troodon formosus, known from Montana.
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 bakkeri (Carpenter, 1982) Pectinodon is a genus of troodontid theropod dinosaurs from the end of the Maastrichtian age of the Late Cretaceous period (66 mya ). It currently contains a single valid species , Pectinodon bakkeri (sometimes classified as Troodon bakkeri ), known only from teeth.
†Troodon †Troodon formosus; 77.5–71 Ma, Campanian to Maastrichtian Judith River Formation, Montana US A troodontid, from the late Cretaceous known from a few teeth. †Variraptor †Variraptor mechinorum; 70 Ma Grès à Reptiles Formation, Provence-Alpes-Côte d'Azur, France A dromaeosaur †Velociraptor †Velociraptor mongoliensis
Acila † Actinoceramus † Actinoceramus concentricus † Actinoceramus sulcatus Life restoration of the Late Cretaceous dome-headed dinosaur Alaskacephale and inset diagram depicting it with an anachronistic human to scale † Alaskacephale – type locality for genus † Alaskacephale gangloffi – type locality for species † Allocotidus – type locality for genus † Allocotidus bruesi ...
Illustration of fossilized teeth of the Late Cretaceous Troodon †Troodon – type locality for genus †Troodon formosus – type locality for species †Tubercuoolithus – type locality for genus †Tubercuoolithus tetonensis – type locality for species †Tubulifloridites †Tubulifloridites aedicula †Tullochelys †Tullochelys montana ...
Today this is usually seen as a junior synonym of Troodon formosus. In 1991, George Olshevsky renamed Pectinodon asiamericanus Nesov 1985 into Saurornithoides asiamericanus. [10] In 1995 he made it a Troodon asiaamericanus. [11] [12] In view of its provenance from the Cenomanian of Uzbekistan, it is usually seen as a different taxon from ...