Charles Gilmore originally described
Thescelosaurus in 1913 from the well preserved original fossil material.This eventually led to his paper on the
osteology of the dinosaur as well. Later, in the 1940's, CM Sternberg discussed the taxonomy of
Thescelosaurus and Hypsilophodontidae, which was once considered to be the family of
Thescelosaurus. More recently
the dinosaur was assigned, through a number of studies
on crania,
postcranial anatomy, and, even
general ornithopod taxonomy, to its own family, Thescelosauridae.
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