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A reevaluation of the hyoid bones of protoceratops andrewsi granger and gregory, 1923 (ornithischia: Ceratopsia) and a review of hyoid elements in ornithischian dinosaurs

Morschhauser, EM and Lamanna, MC (2013) A reevaluation of the hyoid bones of protoceratops andrewsi granger and gregory, 1923 (ornithischia: Ceratopsia) and a review of hyoid elements in ornithischian dinosaurs. Annals of Carnegie Museum, 81 (4). 247 - 255. ISSN 0097-4463

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Abstract

We present a reinterpretation of the bones previously identified as ossified hyoid elements in the Asian Late Cretaceous ceratopsian dinosaur Protoceratops andrewsi Granger and Gregory, 1923. Comparisons with other ceratopsian skeletons indicate that the tetraradiate bone tentatively regarded as a first ceratobranchial is actually an incomplete middle cervical rib, and the larger, flattened elements identified as second ceratobranchials are partial sternal plates. As in nearly all other ornithischian dinosaurs for which this area of the skeleton is known, the ossified hyoid apparatus of P. andrewsi probably consisted of a pair of rod-like first ceratobranchials; two additional, splint-like or sheet-like bones that are most frequently interpreted as ceratohyals may also have been present.

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Details

Item Type: Article
Status: Published
Creators/Authors:
CreatorsEmailPitt UsernameORCID
Morschhauser, EM
Lamanna, MC
Date: 1 September 2013
Date Type: Publication
Access Restriction: No restriction; Release the ETD for access worldwide immediately.
Journal or Publication Title: Annals of Carnegie Museum
Volume: 81
Number: 4
Page Range: 247 - 255
DOI or Unique Handle: 10.2992/007.081.0404
Institution: University of Pittsburgh
Schools and Programs: Dietrich School of Arts and Sciences > Geology and Planetary Science
Refereed: Yes
ISSN: 0097-4463
Article Type: Review
Date Deposited: 22 Apr 2014 16:53
Last Modified: 17 Aug 2021 10:55
URI: http://d-scholarship.pitt.edu/id/eprint/21357

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