Immature skulls of the theropod dinosaur Coelophysis bauri from Ghost Ranch, New Mexico

The theropod dinosaur Coelophysis bauri is well known from the famous Rhaetian, Late Triassic mass death assemblage from the Coelophysis Quarry at Ghost Ranch, New Mexico. This research describes the skulls of two small individuals of C. bauri. Both skulls are mostly complete, though they are missin...

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Main Authors: Jeb E. Bugos, Skye N. McDavid
Format: Article
Language:English
Published: Institute of Paleobiology PAS 2024-12-01
Series:Acta Palaeontologica Polonica
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Online Access:https://www.app.pan.pl/archive/published/app69/app010852023.pdf
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author Jeb E. Bugos
Skye N. McDavid
author_facet Jeb E. Bugos
Skye N. McDavid
author_sort Jeb E. Bugos
collection DOAJ
description The theropod dinosaur Coelophysis bauri is well known from the famous Rhaetian, Late Triassic mass death assemblage from the Coelophysis Quarry at Ghost Ranch, New Mexico. This research describes the skulls of two small individuals of C. bauri. Both skulls are mostly complete, though they are missing premaxillae, and most posterior skull bones are either missing or badly damaged. Both specimens preserve hyoids, making them excellent candidates for hyoid histology. These two skulls have different proportions from other Coelophysis skulls from Ghost Ranch, especially in the large size of the orbit, short and flat triangular teeth, and thinner bones. These differences are interpreted as representing ontogenetic variation, with these skulls representing skeletally immature, partially developed individuals.
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spelling doaj-art-a088dbce9d794ceab53dafa7f40b486f2025-01-15T13:38:04ZengInstitute of Paleobiology PASActa Palaeontologica Polonica1732-24212024-12-0169454956410.4202/app.01085.2023Immature skulls of the theropod dinosaur Coelophysis bauri from Ghost Ranch, New MexicoJeb E. Bugos0Skye N. McDavid1Case Western Reserve University, 10900 Euclid Avenue, Cleveland, Ohio 44106 USA; current address: Cleveland Museum of Natural History, 1 Wade Oval Drive, Cleveland, Ohio 44106 USA. Delaware Valley Paleontological Society, PO Box 686, Plymouth Meeting, Pennsylvania 19462 USA.The theropod dinosaur Coelophysis bauri is well known from the famous Rhaetian, Late Triassic mass death assemblage from the Coelophysis Quarry at Ghost Ranch, New Mexico. This research describes the skulls of two small individuals of C. bauri. Both skulls are mostly complete, though they are missing premaxillae, and most posterior skull bones are either missing or badly damaged. Both specimens preserve hyoids, making them excellent candidates for hyoid histology. These two skulls have different proportions from other Coelophysis skulls from Ghost Ranch, especially in the large size of the orbit, short and flat triangular teeth, and thinner bones. These differences are interpreted as representing ontogenetic variation, with these skulls representing skeletally immature, partially developed individuals.https://www.app.pan.pl/archive/published/app69/app010852023.pdftheropodatriassiccoelophysisontogenychinle formation
spellingShingle Jeb E. Bugos
Skye N. McDavid
Immature skulls of the theropod dinosaur Coelophysis bauri from Ghost Ranch, New Mexico
Acta Palaeontologica Polonica
theropoda
triassic
coelophysis
ontogeny
chinle formation
title Immature skulls of the theropod dinosaur Coelophysis bauri from Ghost Ranch, New Mexico
title_full Immature skulls of the theropod dinosaur Coelophysis bauri from Ghost Ranch, New Mexico
title_fullStr Immature skulls of the theropod dinosaur Coelophysis bauri from Ghost Ranch, New Mexico
title_full_unstemmed Immature skulls of the theropod dinosaur Coelophysis bauri from Ghost Ranch, New Mexico
title_short Immature skulls of the theropod dinosaur Coelophysis bauri from Ghost Ranch, New Mexico
title_sort immature skulls of the theropod dinosaur coelophysis bauri from ghost ranch new mexico
topic theropoda
triassic
coelophysis
ontogeny
chinle formation
url https://www.app.pan.pl/archive/published/app69/app010852023.pdf
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