Results 1 to 10 of about 935 (170)

Paleoneuroanatomy of the aetosaur Neoaetosauroides engaeus (Archosauria: Pseudosuchia) and its paleobiological implications among archosauriforms [PDF]

open access: yesPeerJ, 2018
The paleoneuroanatomy of pseudosuchian archosaurs is poorly known, based on direct examination of the internal morphology of braincases and a few artificial endocasts.
M. Belen von Baczko   +2 more
doaj   +9 more sources

The axial skeleton of Poposaurus langstoni (Pseudosuchia: Poposauroidea) and its implications for accessory intervertebral articulation evolution in pseudosuchian archosaurs [PDF]

open access: goldPeerJ, 2018
Dinosaurs and their close relatives grew to sizes larger than any other terrestrial animal in the history of life on Earth, and many enormous dinosaurs (e.g., Diplodocus, Spinosaurus, Tyrannosaurus) have accessory intervertebral articulations that have ...
Candice M. Stefanic, Sterling J. Nesbitt
doaj   +6 more sources

Ontogeny of a sexually selected structure in an extant archosaur Gavialis gangeticus (Pseudosuchia: Crocodylia) with implications for sexual dimorphism in dinosaurs [PDF]

open access: goldPeerJ, 2020
Despite strong evidence for sexual selection in various display traits and other exaggerated structures in large extinct reptiles, such as dinosaurs, detecting sexual dimorphism in them remains difficult.
David Hone   +3 more
doaj   +4 more sources

Osteology of a forelimb of an aetosaur Stagonolepis olenkae (Archosauria: Pseudosuchia: Aetosauria) from the Krasiejów locality in Poland and its probable adaptations for a scratch-digging behavior [PDF]

open access: goldPeerJ, 2018
Aetosaurs are armored basal archosaurs that played a significant role in land ecosystems during the Late Triassic (237–201 Ma). The polish species Stagonolepis olenkae Sulej, 2010 described from the Krasiejów locality (southern Poland) is one of the ...
Dawid Dróżdż
doaj   +4 more sources

Quantitative biomechanical assessment of locomotor capabilities of the stem archosaur Euparkeria capensis [PDF]

open access: yesRoyal Society Open Science, 2023
Birds and crocodylians are the only remaining members of Archosauria (ruling reptiles) and they exhibit major differences in posture and gait, which are polar opposites in terms of locomotor strategies.
Oliver E. Demuth   +2 more
doaj   +2 more sources

Estimating Gaits of an Ancient Crocodile-Line Archosaur Through Trajectory Optimization, With Comparison to Fossil Trackways [PDF]

open access: yesFrontiers in Bioengineering and Biotechnology, 2022
Fossil trackways provide a glimpse into the behavior of extinct animals. However, while providing information of the trackmaker size, stride, and even speed, the actual gait of the organism can be ambiguous. This is especially true of quadrupedal animals,
Delyle T. Polet, John R. Hutchinson
doaj   +2 more sources

A new pseudosuchian archosaur, Mambawakale ruhuhu gen. et sp. nov., from the Middle Triassic Manda Beds of Tanzania [PDF]

open access: yesRoyal Society Open Science, 2022
The Manda Beds of southwest Tanzania have yielded key insights into the early evolutionary radiation of archosaurian reptiles. Many key archosaur specimens were collected from the Manda Beds in the 1930s and 1960s, but until recently, few of these had ...
Richard J. Butler   +4 more
doaj   +2 more sources

Locomotion and the early Mesozoic success of Archosauromorpha [PDF]

open access: yesRoyal Society Open Science
The Triassic was a time of ecological upheaval as life recovered from the Permian-Triassic mass extinction. Archosauromorphs were a key component of the recovery, diversifying substantially during the Triassic and encompassing the origins of dinosaurs ...
Amy E. Shipley   +4 more
doaj   +2 more sources

Osteology of the Late Triassic aetosaur Scutarx deltatylus (Archosauria: Pseudosuchia) [PDF]

open access: goldPeerJ, 2016
Aetosaurians are some of the most common fossils collected from the Upper Triassic Chinle Formation of Arizona, especially at the Petrified Forest National Park (PEFO). Aetosaurians collected from lower levels of the park include Desmatosuchus spurensis,
William G. Parker
doaj   +3 more sources

The osteology and phylogenetic position of the loricatan (Archosauria: Pseudosuchia) Heptasuchus clarki, from the ?Mid-Upper Triassic, southeastern Big Horn Mountains, Central Wyoming (USA) [PDF]

open access: yesPeerJ, 2020
Loricatan pseudosuchians (known as “rauisuchians”) typically consist of poorly understood fragmentary remains known worldwide from the Middle Triassic to the end of the Triassic Period.
Sterling J. Nesbitt   +2 more
doaj   +3 more sources

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