First occurrence ofDoswelliacf.D. kaltenbachi(Archosauriformes) from the Late Triassic (middle Norian) Chinle Formation of Arizona and its implications on proposed biostratigraphic correlations across North America during the Late Triassic

2021/05/04 by William G. Parker, Sterling J. Nesbitt, Adam D. Marsh +2 · 1 citation
Earth and Planetary Sciences · Environmental Science · #Paleontology and Evolutionary Biology #Evolution and Paleontology Studies #Amphibian and Reptile Biology #Paleontology #Geology #Taxon #Vertebrate #Assemblage (archaeology) #Archaeology #Geography #Biology

paper · doi:10.1080/02724634.2021.1976196

openalex publication_date 2021/05/04 · openalex created_date 2021/11/08 · openalex updated_date 2026/07/02

Abstract

Doswellia kaltenbachi is a long-snouted non-archosaur archosauriform known from the Late Triassic of the United States (Virginia and Texas). New material from the Chinle Formation of Arizona represents the first occurrence of D. cf. D. kaltenbachi from that formation and state. This occurrence is from the type section for the Adamanian estimated holochronozone (Late Triassic: middle Norian) in Petrified Forest National Park and firmly establishes the presence of this taxon in the Adamanian. This occurrence adds to the diverse vertebrate assemblage of the upper part of the Blue Mesa Member of the Chinle Formation (Adamanian). More broadly, the new occurrence strengthens biogeographic links to the older (latest Carnian or earliest Norian) Otischalkian from Texas and the possibly older Sanfordian/Conewagian assemblages of Virginia. The spatiotemporal distribution of Doswellia underscores the similarity of North American continental vertebrate assemblages across the Carnian–Norian boundary prior to the Adamanian–Revueltian boundary.

Citations

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• Maximum depositional age estimation revisited
• A new non-mammalian eucynodont from the Chinle Formation (Triassic: Norian), and implications for the early Mesozoic equatorial cynodont record
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Cited by

• Petrified Forest National Park [wikipedia]

Related

• The Late Triassic (Norian) Adamanian–Revueltian tetrapod faunal transition in the Chinle Formation of Petrified Forest National Park, Arizona
• A new non-mammalian eucynodont from the Chinle Formation (Triassic: Norian), and implications for the early Mesozoic equatorial cynodont record
• First records of diapsid Palacrodon from the Norian,Late Triassic Chinle Formation of Arizona, and theirbiogeographic implications
• New trilophosaurid species demonstrates a decline in allokotosaur diversity across the Adamanian-Revueltian boundary in the Late Triassic of western North America
• Silesaurid ( Archosauria: Dinosauriformes ) remains from the base of the Dockum Group ( Late Triassic: Otischalkian ) of Texas provide new insights to the North American record of dinosauriforms