Thescelosaurus
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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;
Charles Gilmore's 1915 skeletal reconstruction of the T. neglectus type specimen (known remains are shaded) with head and neck after Hypsilophodon
Cast of CMN 8537, the type specimen of T. edmontonensis
Thescelosaurus with skin impressions, Museum of the Rockies specimen 979
Cast of skull and part of neck of the T. neglectus specimen "Willo" before complete preparation
Tanis (fossil site)
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Tanis is a private paleontological site in southwestern North Dakota, United States. It is part of the heavily studied Hell Creek Formation, a geological region renowned for many significant fossil di
Thescelosaurus
…assignment of this specimen and the "Willo" specimen to T. neglectus. In 2022, news media reported that a specimen of Thescelosaurus was found at the Tanis fossil site in North Dakota, which is thought to show direct signs of the Chicxulub asteroid impact in the Gulf of Mexico that resulted in the K-Pg extinction. The…
Various fossils from the Tanis site
K-Pg boundary sample from Wyoming. The intermediate claystone layer contains 1000 times more iridium than the upper and lower layers (San Diego Natural History Museum).