Thescelosaurus sp.

Fig. 8

Material: Teeth: UCM 43223 (UCMP-V5711) H 1.9 mm, W 2.2 mm; UCMP 124972 (UCMP-V5620) H 1.6 mm, W 2.4 mm; UCMP 124973 (UCMP-V5620) H 2.2 mm, W 3 mm; UCMP 124974 (UCMP-V5620) H 2 mm, W 2.5 mm; UCMP 124975 (UCMP-V5620) H 2.2 mm, W 3 mm; UCMP 124976 (UCMP-V5620) H 1.5 mm, W 2.3 mm; UCMP 124977 (UCMP-V5620) H 1.3 mm, W 2.5 mm; UCMP 124997 (UCMP-V5815) H 1.5 mm, 2 mm; and UCMP 124998 (UCMP-V5815) H 3.2 mm; 2.7 mm.

Discussion: These teeth look like minute versions of the cheek teeth figured by Sternberg (1940). The teeth are enameled on one side; this side has numerous vertical corrugations. The opposite side lacks enamel, and in many specimens shows considerable wear. The wear may produce two facets on each side of the midline, which meet at the apex as figured by Sternberg, or may produce a single facet across the entire surface. No conical premaxillary teeth are present in the collections.