Thescelosauridae

Thescelosaurus ( ) is a genus of ornithischian dinosaur that lived during the Late Cretaceous period in western North America. It was named and described in 1913 by the paleontologist Charles W. Gilmore; the type species is T. neglectus. Two other species, T. garbanii and T. assiniboiensis, were named in 1976 and 2011, respectively. Additional species have been suggested but are currently not accepted. Thescelosaurus is the eponymous member of its family, the Thescelosauridae. Thescelosaurids are either considered to be basal ("primitive") ornithopods, or are placed outside of this group withi

thumb|Reconstruction of the Orodromeus skeleton

Parksosaurus (meaning "William Parks's lizard") is a genus of neornithischian dinosaur from the early Maastrichtian-aged (Upper Cretaceous) Horseshoe Canyon Formation of Alberta, Canada. It is based on most of a partially articulated skeleton and partial skull, showing it to have been a small, bipedal, herbivorous dinosaur. It is one of the few described non-hadrosaurid ornithopods from the end of the Cretaceous in North America, existing around 70 million years ago.

Zephyrosaurus (meaning "westward wind lizard") is a genus of orodromine ornithischian dinosaur based on a partial skull and postcranial fragments discovered in the Early Cretaceous (Aptian-Albian) Cloverly Formation of Carbon County, Montana, USA. New remains are under description, and tracks from Maryland and Virginia, also in the US, have been attributed to animals similar to Zephyrosaurus.

Oryctodromeus (from Ancient Greek ὀρυκτήρ (oruktḗs), meaning "digger", and δρομαῖος (dromaîos), meaning "runner") is an extinct genus of small orodromine thescelosaurid dinosaur. Fossils are known from the Late Cretaceous Blackleaf Formation of southwestern Montana and the Wayan Formation of southeastern Idaho, USA, both of the Cenomanian stage, roughly 105-96 million years ago. A member of the small, presumably fast-running herbivorous family Thescelosauridae, Oryctodromeus is the first non-avian dinosaur published that shows evidence of burrowing behavior.

Jeholosaurus is a genus of small neornithischian dinosaur from the Early Cretaceous-aged Yixian Formation of what is now China.

Koreanosaurus () is a genus of orodromine neornithischian dinosaur that lived during the Campanian stage of the Late Cretaceous of what is now South Korea. One species has been described, Koreanosaurus boseongensis.

Changchunsaurus (meaning "Changchun lizard") is an extinct genus of small herbivorous neornithischian dinosaur from Early or Late Cretaceous deposits of Gongzhuling, Jilin, China. It is the first named dinosaur genus from that region.

genus of reptiles (fossil)

Albertadromeus is an extinct genus of orodromine thescelosaurid dinosaur known from the upper part of the Late Cretaceous Oldman Formation (middle Campanian stage) of Alberta, Canada. It contains a single species, Albertadromeus syntarsus.

Thescelosauridae is a clade of neornithischians from the Cretaceous of East Asia and North America. The group was originally used as a name by Charles M. Sternberg in 1937, but was not formally defined until 2013, where it was used by Brown and colleagues as the group uniting Thescelosaurus and Orodromeus, based on their phylogenetic results. During a phylogenetic revision of neornithischians by Clint Boyd in 2015, the authorship of Thescelosauridae was given to Brown and colleagues, which meant that the similar name Parksosauridae, informally defined in 2002 by Buchholz, would have had priori

Yueosaurus is an extinct genus of basal neornithischian dinosaur known from Zhejiang Province, China.

Nevadadromeus (meaning "Nevada runner") is an extinct genus of small thescelosaurine ornithischian dinosaur, from the Willow Tank Formation of Nevada, United States. The genus contains a single species, N. schmitti, which represents the first non-avian dinosaur named from Nevada.

Doolysaurus is an extinct genus of thescelosaurid ornithischian dinosaur known from the Cretaceous (Albian–lower Cenomanian) Ilseongsan Formation of South Korea. The genus contains a single species, Doolysaurus huhmini, known from the partial skeleton of a small juvenile individual. It is the first named South Korean dinosaur with diagnostic cranial material, providing important insight into the early evolution of thescelosaurid ornithischians in East Asia, and the second named basal neornithischian from South Korea after Koreanosaurus.

Fona ( ; ) is an extinct genus of thescelosaurine thescelosaurid ornithischian dinosaurs from the 'mid'-Cretaceous Cedar Mountain Formation (Mussentuchit Member) of Utah, United States. The genus contains a single species, F. herzogae, known from several partial skeletons and skulls. Based on anatomical similarities to the closely related and similarly aged Oryctodromeus, Fona was likely a semi-fossorial animal, likely spending a significant amount of time in underground burrows. It also represents the oldest known definitive thescelosaurine.

Changmiania (from the Chinese "changmian", meaning "eternal sleep") is a genus of basal ornithopod dinosaur that lived in what is now China during the Early Cretaceous. It contains a single species, Changmiania liaoningensis.

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