Genus: Parksosaurus STERNBERG, 1937
Etymology: In honor of William Arthur Parks, and Greek, sauros, lizard: Parks lizard.
= Parkosaurus CZERKAS & OLSON, 1987 (sic)

Species: warrenae (PARKS, 1926) STERNBERG, 1937
Etymology:
= Parksosaurus warreni (PARKS, 1926) STERNBERG, 1937
= Thescelosaurus warreni PAKRS, 1926
= Thescelesaurus warreni NOPCSA, 1929 (sic)

Holotype: ROM 804

Locality: East side of the Red Deer River, immediately south of the road to Rumsey Ferry, 100 feet above 5 the level of water, Starland County, Alberta Province, Canada.

Horizon: Horseshoe Canyon Formation, Edmonton Group.

Biostratigraphy:

Age: Edmontonian age, lower Maastrichtian Stage, Upper Senonian subepoch, Upper Gulf Epoch, Late Cretaceous.
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Material: Fragmentary skull, fragmentary dentary, and fragmentary skeleton.