Ceratopsidae Marsh 1888
| Main Author: | Carpenter, Kenneth |
|---|---|
| Format: | info publication-taxonomictreatment Journal |
| Terbitan: |
, 1982
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| Subjects: | |
| Online Access: |
https://zenodo.org/record/5610926 |
Daftar Isi:
- Family CERATOPSIDAE Fig. 10 Material: Teeth: UCM 37878 (UCMP-V5711) H 6 mm, W 3.8 mm; UCM 43526 (UCMP-V5711) H 2 mm, W 2.5 mm; UCM 45057 (UCMP-V 5711) H 3.6 mm, W 3.8 mm; UCM 45058 (UCMP-V 5711) H 3.5 mm, W 4.1 mm; and UCM 45059 (UCMP-V5711) H 4 mm, W 3.7 mm. Discussion: Only UCM 45059 is heavily worn. Unworn teeth have a triangular enameled face with a vertical medial ridge (Fig. 10). Small denticles are present along the upper edge of the enameled surface. Unlike adult ceratopsian teeth, these have a single unbifurcated root, a condition Hatcher and others (1907) noted for young incipient teeth. It is doubtful that these small teeth are incipient teeth of an adult, because they are well developed and have a long root, which is unlike the short, thin-walled, open root of the adult. It is probable that the root became bifurcated as the animal matured. Because there are two genera of ceratopsians (Triceratops and Torosaurus) in the Lance and Hell Creek formations, it is not possible to be more specific in the identification.
- Published as part of Carpenter, Kenneth, 1982, Baby dinosaurs from the Late Cretaceous Lance and Hell Creek formations and a description of a new species of theropod, pp. 123-134 in Contributions to Geology, University of Wyoming 20 on page 131, DOI: 10.5281/zenodo.3238510