Project 3202: M. D. D'Emic, M. T. Carrano. 2020. Redescription of Brachiosaurid Sauropod Dinosaur Material From the Upper Jurassic Morrison Formation, Colorado, USA. The Anatomical Record. 303 (4):732-758.
Abstract
Like many long-standing dinosaur taxa, Brachiosaurus altithorax fromthe Upper Jurassic Morrison Formation of North America suffers from taxonomic issues stemming from a relatively incomplete holotype. Lack of anatomical overlap has precluded definitive referral of important specimens, including a mostly complete skull discovered in 1883. We redescribe this skull and some other significant brachiosaurid specimens based on new prepara- tion and computed tomographic (CT) data. We argue that these elements are most parsimoniously referred to B. altithorax. Including these tentatively referred elements in a phylogenetic analysis does not alter the hypothesized relationships of B. altithorax, congruent with the presence of a single brachiosaurid taxon across western North America in the Late Jurassic. Based on CT data, we estimate that B. altithorax had a slower tooth replacement rate than Camarasaurus or the diplodocoids it shared Morrison Formation landscapes with, which suggests a difference in diet and/or feeding strategy.
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Article DOI: 10.1002/ar.24198
Project DOI: 10.7934/P3202, http://dx.doi.org/10.7934/P3202
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MorphoBank Project 3202
MorphoBank Project 3202
- Creation Date:
02 June 2018 - Publication Date:
05 December 2019 - Project views: 28927
- Media downloads: 39
Authors' Institutions
- National Museum of Natural History, Smithsonian Institution
- Adelphi University
Members
member name | taxa | specimens | media |
Michael D'Emic Project Administrator | 2 | 3 | 5 |
MorphoBank Curator Full membership | 0 | 0 | 5 |
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Folio views | 2284 | Folio list (535 views); Braincase USNM 5730 Brachiosaurus (336 views); CT scan Maxilla USNM 5730 Brachiosaurus (319 views); Dentary USNM 5730 (392 views); Potter Creek Cervical Vertebrae (318 views); Premaxilla CT scan USNM 5730 (384 views); |
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