Aspects of the palynology of the Chinle Formation (Upper Triassic), Colorado Plateau, Arizona, Utah, and New Mexico

1982 ◽  
Author(s):  
Richard A. Scott
Keyword(s):  
New Mexico ◽  
Colorado Plateau ◽  
Upper Triassic ◽  
Chinle Formation

scholarly journals The Pangaean Megamonsoon: Evidence from the Upper Triassic Chinle Formation, Colorado Plateau

Palaios ◽  
1991 ◽  
Vol 6 (4) ◽  
pp. 347 ◽  
Author(s):  
Russell F. Dubiel ◽  
Judith Totman Parrish ◽  
J. Michael Parrish ◽  
Steven C. Good
Keyword(s):  
Colorado Plateau ◽  
Upper Triassic ◽  
Chinle Formation

Dolabrosaurus aquatilis, a small lepidosauromorph reptile from the Upper Triassic Chinle Formation of north-central New Mexico

1992 ◽  
Vol 66 (6) ◽  
pp. 1001-1009 ◽  
Author(s):  
David S Berman ◽  
Robert R. Reisz
Keyword(s):  
New Mexico ◽  
Vertebral Column ◽  
Upper Triassic ◽  
Single Specimen ◽  
Italian Alps ◽  
North Central ◽  
New Family ◽  
Chinle Formation

Dolabrosaurus aquatilis n. gen. and sp., a small amphibious or aquatic reptile from the Upper Triassic Chinle Formation of north-central New Mexico, is described on the basis of portions of the vertebral column and partial fore- and hindlimbs of a single specimen. Comparison with other Triassic reptiles indicates that D. aquatilis is most closely related to Drepanosaurus unguicaudatus, a small, enigmatic lepidosauromorph from the Upper Triassic Zorzino Formation of the Italian Alps. Both species are assigned to a new family, Drepanosauridae, with Dolabrosaurus recognized as more primitive in some aspects of its vertebral and pedal morphology. The precise assignment of Drepanosauridae within the Lepidosauromorpha remains uncertain.

scholarly journals A new rauisuchid (Archosauria, Pseudosuchia) from the Upper Triassic (Norian) of New Mexico increases the diversity and temporal range of the clade

PeerJ ◽  
2016 ◽  
Vol 4 ◽  
pp. e2336 ◽  
Author(s):  
Emily J. Lessner ◽  
Michelle R. Stocker ◽  
Nathan D. Smith ◽  
Alan H. Turner ◽  
Randall B. Irmis ◽  
...  
Keyword(s):  
United States ◽  
New Mexico ◽  
Upper Triassic ◽  
Late Triassic ◽  
Morphological Evidence ◽  
Ventral Margin ◽  
Close Phylogenetic Relationship ◽  
Chinle Formation ◽  
Geographic Separation ◽  
A New Species

Rauisuchids are large (2–6 m in length), carnivorous, and quadrupedal pseudosuchian archosaurs closely related to crocodylomorphs. Though geographically widespread, fossils of this clade are relatively rare in Late Triassic assemblages. The middle Norian (∼212 Ma) Hayden Quarry of northern New Mexico, USA, in the Petrified Forest Member of the Chinle Formation, has yielded isolated postcranial elements and associated skull elements of a new species of rauisuchid.Vivaron haydenigen. et. sp. nov. is diagnosed by the presence of two posteriorly directed prongs at the posterior end of the maxilla for articulation with the jugal. The holotype maxilla and referred elements are similar to those of the rauisuchidPostosuchus kirkpatrickifrom the southwestern United States, butV. haydenishares several maxillary apomorphies (e.g., a distinct dropoff to the antorbital fossa that is not a ridge, a straight ventral margin, and a well defined dental groove) with the rauisuchidTeratosaurus suevicusfrom the Norian of Germany. Despite their geographic separation, this morphological evidence implies a close phylogenetic relationship betweenV. haydeniandT. suevicus. The morphology preserved in the new Hayden Quarry rauisuchidV. haydenisupports previously proposed and new synapomorphies for nodes within Rauisuchidae. The discovery ofVivaron haydenireveals an increased range of morphological disparity for rauisuchids from the low-paleolatitude Chinle Formation and a clear biogeographic connection with high paleolatitude Pangea.

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