BYU

Abstract by Andrew Beach

Personal Infomation


Presenter's Name

Andrew Beach

Co-Presenters

None

Degree Level

Undergraduate

Co-Authors

None

Abstract Infomation


Department

Geological Sciences

Faculty Advisor

Brooks Britt

Title

Triceratops and Torosaurus synonymy: an evaluation of two BYU specimens

Abstract

Due to the recent controversy surrounding the synonymizing of Torosaurus and Triceratops, two skulls from the BYU Museum of Paleontology have been evaluated. BYU 12183 initially appeared to maintain typical Triceratops morphology, and did not possess mature “Torosaurus” features despite its exceptionally large size. However, examination of the original specimen shows extensive restoration bias, obscuring the original morphology. A second large, un-restored Triceratops frill (BYU 19974) possesses dorso-ventrally compressed epiparietals and episquamosals, a sign of ontogenetic maturity. Significant thinning of the parietal occurs in areas that correspond to the parietal fenestrae observed in “Torosaurus.” These features indicate that it is an ontogenetically transitional form between Triceratops and “Torosaurus.”