Mounted specimen of Thescelosaurus, Burpee Museum of Natural History
Scientific classification
Domain:
Eukaryota
Kingdom:
Animalia
Phylum:
Chordata
Clade:
Dinosauria
Clade:
†Ornithischia
Clade:
†Neornithischia
Family:
†Thescelosauridae Sternberg, 1937
Subfamilies[1]
Orodrominae Brown et al, 2013
Albertadromeus
Koreanosaurus
Orodromeus
Oryctodromeus
Zephyrosaurus
Thescelosaurinae Sternberg, 1940
Changchunsaurus?
Haya?
Jeholosaurus?
Nevadadromeus
Parksosaurus
Thescelosaurus
Yueosaurus?
Synonyms[1]
Parksosauridae Buchholtz, 2002
Jeholosauridae? Han et al., 2012
Thescelosauridae is a clade of neornithischians from the Cretaceous of Asia, North America and possibly South 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.[1][2] 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 priority over Thescelosauridae. The two clades had slightly different definitions, with Parksosauridae referring to all animals closer to Parksosaurus than Hypsilophodon, but they contained the same taxa so Boyd used Parksosauridae under the assumption it had priority.[3] However, in formalizing the clade following the regulations of the PhyloCode, Madzia, Boyd, and colleagues identified in 2021 that Sternberg was the proper authority for Thescelosauridae, giving it priority over Parksosauridae. As well, they gave Thescelosauridae the definition of the largest clade containing Thescelosaurus neglectus but not Iguanodon bernissartensis, as long as Hypsilophodon foxii was not in the group, modifying previous definitions for Thescelosauridae in order to maintain its modern use, so that the clade was not applied if Thescelosaurus fell within Hypsilophodontidae, a family that has not been recently used but may be revived if the systematic position of Hypsilophodon was solidified at some point in the future.[1] Madzia et al. identified the analysis of Madzia et al. in 2018 as the reference analysis for the name Thescelosauridae, an analysis based on a revised version of the 2015 Boyd analysis.[1][4]
^Brown, C.M.; Evans, D.C.; Ryan, M.J.; Russell, A.P. (2013). "New data on the diversity and abundance of small-bodied ornithopods (Dinosauria, Ornithischia) from the Belly River Group (Campanian) of Alberta". Journal of Vertebrate Paleontology. 33 (3): 495–520. doi:10.1080/02724634.2013.746229. S2CID 129160518.
^Cite error: The named reference boyd2015 was invoked but never defined (see the help page).
^Madzia, D.; Boyd, C.A.; Mazuch, M. (2017). "A basal ornithopod dinosaur from the Cenomanian of the Czech Republic". Journal of Systematic Palaeontology. 16 (11): 967–979. doi:10.1080/14772019.2017.1371258. S2CID 90008574.
Thescelosauridae is a clade of neornithischians from the Cretaceous of Asia, North America and possibly South America. The group was originally used as...
genus, Hypsilophodon, with the other genera being within clades like Thescelosauridae and Elasmaria. A 2014 analysis by Norman recovered a grouping of Hypsilophodon...
Haya to Jeholosauridae, but moved Yueosaurus to the sister family Thescelosauridae. Han, Feng-Lu; Paul M. Barrett; Richard J. Butler; Xing Xu (2012)....
Hypsilophodontidae has been followed by the recognition of the distinct family Thescelosauridae. This area of the dinosaur family tree has historically been complicated...
All three claded together at the base of the Neornithischia, outside Thescelosauridae and Cerapoda, making it the first basal neornithischian known from...
which consisted of several "traditional" hypsilophodontids, as well as Thescelosauridae. The Bayesian topology of her phylogenetic analyses is shown in the...
A member of the small, presumably fast-running herbivorous family Thescelosauridae, Oryctodromeus is the first non-avian dinosaur published that shows...
member of the Euornithopoda. Brown et al. (2013) put it in the family Thescelosauridae and named a new subfamily (Orodrominae) after it. Because of the advanced...
analysis in the 2010s has classified Zephyrosaurus as part of the Thescelosauridae family. Zephyrosaurus would have been a small, swift, bipedal herbivore...
families of the quarry. The families in question are Hadrosauridae, Thescelosauridae, Leptoceratopsidae, Ceratopsidae, Tyrannosauridae, Dromaeosauridae...
recovering Haya outside of Jeholosauridae, and instead as part of Thescelosauridae. Makovicky, Peter J.; Brandon M. Kilbourne; Rudyard W. Sadleir; Mark...
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