Sterling J. Nesbitt

A new taxon of hybodontiform (Chondrichthyes, Elasmobranchii, Hybodontiformes) from the Late Triassic of Arizona, U.S.A., and its biostratigraphic importance within the Chinle Formation

Emily Keeble, Ben T. Kligman, Adam D. Marsh, Michelle R. Stocker et autres

Elasmobranchs are excellent candidates for biostratigraphy, with distinctive dentitions and wide distributions over a long period of time. However, the high variation in tooth shapes present within some groups of chondrichthyans makes disentangling species variation from higher levels of taxonomy difficult. Here, …

A new taxon of hybodontiform (Chondrichthyes, Elasmobranchii, Hybodontiformes) from the Late Triassic of Arizona, U.S.A., and its biostratigraphic importance within the Chinle Formation

Emily Keeble, Ben T. Kligman, Adam D. Marsh, Michelle R. Stocker et autres

Elasmobranchs are excellent candidates for biostratigraphy, with distinctive dentitions and wide distributions over a long period of time. However, the high variation in tooth shapes present within some groups of chondrichthyans makes disentangling species variation from higher levels of taxonomy difficult. Here, …

New data on the Triassic temnospondyls from the Karoo rift basins of Tanzania and Zambia

Jean-Sébastien Steyer, Brandon R. Peecook, Thomas Arbez, Sterling J. Nesbitt et autres

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A new taxon of hybodontiform (Chondrichthyes, Elasmobranchii, Hybodontiformes) from the Late Triassic of Arizona, U.S.A., and its biostratigraphic importance within the Chinle Formation

Emily Keeble, Ben T. Kligman, Adam D. Marsh, Michelle R. Stocker et autres

Elasmobranchs are excellent candidates for biostratigraphy, with distinctive dentitions and wide distributions over a long period of time. However, the high variation in tooth shapes present within some groups of chondrichthyans makes disentangling species variation from higher levels of taxonomy difficult. Here, …

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Identifying shark cartilage in the fossil record: the first occurrence of calcified (Chondrichthyes) cartilage from the Upper Triassic of the western United States

Denycè S. E. Velin, Michelle R. Stocker, Chris Flis, Adam D. Marsh et autres

Calcified cartilage is a diagnostic feature of chondrichthyan endoskeletons but is rarely preserved in the fossil record because of its susceptibility to degradation, which limits our understanding of the history and evolution of chondrichthyan endoskeletons. Here, three fossil cartilage specimens from the …

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Blood flow rates to long bones of archosaurs reveal high aerobic metabolic rates and endothermy throughout most of their evolutionary history

Roger S. Seymour, Case Vincent Miller, Qiaohui Hu, Martín D. Ezcurra et autres

Abstract The origin and evolution of endothermy among Archosauria are uncertain because living species are represented by two lineages: ectothermic crocodylians (Pseudosuchia) and endothermic birds (Avemetatarsalia). Endothermy is characterized by high metabolic rates (tachymetabolism) and a physiological ability to control body temperature …

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A new shuvosaurid (Archosauria, Poposauroidea) from the Late Triassic (Norian) Hayden Quarry of New Mexico, U.S.A.

Alan H. Turner, Ciara E. Kernan, Adam Laing, Adam C. Pritchard et autres

Bipedal shuvosaurid archosaurs were present for much of the Late Triassic Period. The clade is particularly diverse in Upper Triassic assemblages in the western U.S.A. Isolated bones are easily differentiated from contemporary archosaurs, but the two named North American species, Shuvosaurus inexpectatus …

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Data from: Comparative histological analysis of vertebrates reveals Triassic climate variability across southern Pangea

Valerie Trinidad, Darlington Munyikwa, Michel Zondo, Timothy J. Broderick et autres

Climate influenced the distribution of major animal groups that emerged during the Triassic period throughout the supercontinent Pangea. The earliest dinosaurs and associated assemblages (Carnian Stage, Late Triassic, ~230 Ma) are recovered along a paleolatitudinal climate belt spanning southern Pangea. However, developmental …

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Comparative histological analysis of vertebrates reveals Triassic climate variability across southern Pangea

Valerie Trinidad, Darlington Munyikwa, Michel Zondo, Timothy J. Broderick et autres

Climate highly influenced the distribution of major animal groups that emerged during the Triassic throughout the supercontinent Pangea. The earliest dinosaurs and associated assemblages (Carnian Stage, Late Triassic, ~230 Ma) are recovered along a paleolatitudinal climate belt spanning southern Pangea. However, developmental …

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Braincase anatomy and palaeoneurology of Venetoraptor gassenae , a lagerpetid pterosauromorph from the Late Triassic of southern Brazil

Lísie V. S. Damke, Leonardo Kerber, Mario Bronzati, Maurício Silva Garcia et autres

Abstract There is a growing consensus that pterosaurs and the flightless Lagerpetidae are closely related. This relationship is supported by apomorphies throughout the skeleton, including endocranial character states such as a well‐developed floccular fossa and a tall anterior semicircular canal. Our knowledge …

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A new taxon of saurischian dinosaur from the Coelophysis Quarry of New Mexico, USA (Triassic: latest Norian or Rhaetian) highlights herrerasaurian diversity in the latest Triassic

Simba Srivastava, Sterling J. Nesbitt

Abstract The most complete record of the earliest dinosaur lineages is from the Carnian from the higher latitudes of Pangea (e.g. present‐day Brazil, Argentina), but dinosaurian assemblages from the upper stages of the Upper Triassic are better known from the low latitudes …

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New data on the Triassic temnospondyls from the Karoo rift basins of Tanzania and Zambia

Jean-Sébastien Steyer, Brandon R. Peecook, Thomas Arbez, Sterling J. Nesbitt et autres

fr, us, Zambie, Afrique du Sud (code pays fourni par la source)