Results 21 to 30 of about 916 (163)

Anatomically grounded estimation of hindlimb muscle sizes in Archosauria

open access: yesJournal of Anatomy, 2022
AbstractIn vertebrates, active movement is driven by muscle forces acting on bones, either directly or through tendinous insertions. There has been much debate over how muscle size and force are reflected by the muscular attachment areas (AAs). Here we investigate the relationship between the physiological cross‐sectional area (PCSA), a proxy for the ...
Andrew R. Cuff   +5 more
openaire   +2 more sources

Cocodrilos (Archosauria: Crocodylia) de la región neotropical

open access: yesBiota Colombiana, 2000
Crocodylia [Gmelin, 1789], originalmente Crocodili, es un orden con distribución circuntropical, aunque algunas especies actualmente ocupan áreas cálidas de la zona temperada. Los cocodrilos vivientes tienen sus ancestros en los protosuchios del triásico
Miguel A. Rodríguez M.
doaj   +8 more sources

Stomach histology of Crocodylus siamensis and Gavialis gangeticus reveals analogy of archosaur “gizzards”, with implication on crocodylian gastroliths function

open access: yesActa Herpetologica, 2020
Two groups of extant Archosauria, Crocodylia and Neornithes, have two-chambered stomachs and store gastroliths inside their “gizzards”. Morphological similarities of the “gizzards” lead some previous studies to assume that the presence of this structure,
Ryuji Takasaki, Yoshitsugu Kobayashi
doaj   +1 more source

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

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   +1 more source

Systematics of putative euparkeriids (Diapsida: Archosauriformes) from the Triassic of China [PDF]

open access: yesPeerJ, 2014
The South African species Euparkeria capensis is of great importance for understanding the early radiation of archosauromorphs (including archosaurs) following the Permo–Triassic mass extinction, as most phylogenetic analyses place it as the sister taxon
Roland B. Sookias   +3 more
doaj   +2 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   +2 more sources

The phylogenetic relationships of basal archosauromorphs, with an emphasis on the systematics of proterosuchian archosauriforms [PDF]

open access: yesPeerJ, 2016
The early evolution of archosauromorphs during the Permo-Triassic constitutes an excellent empirical case study to shed light on evolutionary radiations in deep time and the timing and processes of recovery of terrestrial faunas after a mass extinction ...
Martín D. Ezcurra
doaj   +2 more sources

Evolution of Diversity in the Auditory Papillae of Reptiles

open access: yesDiversity, 2023
The independent origins of middle ears in testudinates, lepidosaurs, and archosaurs in the Triassic led to lineage-specific developments in their auditory epithelia.
Geoffrey A. Manley
doaj   +1 more source

A new occurrence of the Late Triassic archosaur Smok in southern Poland [PDF]

open access: yesActa Palaeontologica Polonica, 2018
Two isolated teeth, a dorsal vertebra, fragments of a humerus and femur, a fragmentary pubic “boot” and part of an ischium shaft, identified here as belonging to a large predatory archosaur were discovered in the Upper Triassic site at Marciszów near ...
Grzegorz Niedźwiedzki   +1 more
doaj   +1 more source

Hindlimb biomechanics of Lagosuchus talampayensis (Archosauria, Dinosauriformes), with comments on skeletal morphology. [PDF]

open access: yesJ Anat
AbstractLagosuchus talampayensis is a small‐bodied (~0.5 m long) Late Triassic dinosauriform archosaur from Argentina. Lagosuchus long has been a pivotal taxon for reconstructing the evolution of form and function on the dinosaur lineage. This importance is because it has a mix of ancestral archosaurian traits, such as a small pelvis with a mostly ...
Otero A, Bishop PJ, Hutchinson JR.
europepmc   +3 more sources

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