Thescelosaurus, Gilmore, 1913

Carpenter, Kenneth, 1982, Baby dinosaurs from the Late Cretaceous Lance and Hell Creek formations and a description of a new species of theropod, Contributions to Geology, University of Wyoming 20, pp. 123-134 : 130-131

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.

Figures

Figures 1-11. Fig. 1, Dromaeosauridae, tooth, UCM 39502. Fig. 2a-h, Sauromithoides inequalis: 20,, buccal view of hatchling left dentary, UCM 41666; c, lingual view; e, dorsal view; b, buccal view of left dentary, NMC 8540 (cast); d, lingual view; f, dorsal view; g, lateral view of hatchling basioccipital, UCM 43218; and h, ventral view. Fig. 3a-c, teeth of Pectinodon bakkeri: a, holotype, UCM 38445; b, paratype, UCM 38446; and c, paratype, UCMP 73098. Fig. 4, Pararıychodon lacustris, tooth, UCMP 124990. Fig. 5a, b, Tyrannosauridae: a as lateral view of UCMP 119853; and b, posterior view. Fig. 6, Theropoda, tooth, UCMP 124987. Fig. 7a, b, tooth of Aublysodon mirandus: a! lateral view of UCMP 124406; and b, posterior view. Fig. 8, Thescelosaurus sp., tooth, UCMP 124973. Fig. 9, Hadrosauridae, tooth, UCM 45060. Fig. 10, Ceratopsidae, tooth, UCM 45057. Fig. 11, Ankylosaurus magniventris, tooth, UCMP 124399. Heavy bars to left of specimens = 2 mm.