Results 11 to 20 of about 929 (163)

Cranial anatomy of Desmatosuchus haplocerus (Reptilia: Archosauria: Stagonolepididae) [PDF]

open access: yesZoological Journal of the Linnean Society, 2002
New skull material of the Triassic aetosaur Desmatosuchus haplocerus (Archosauria: Stagonolepididae) from the Cooper Canyon Formation (Late Triassic: early Norian) of Texas is described. This is the most complete description of the skull of Desmatosuchus to date, shedding light on the edentulous premaxilla, laterally exposed splenial on the mandible ...
exaly   +2 more sources

Ontogeny of the Middle-Ear Air-Sinus System in Alligator mississippiensis (Archosauria: Crocodylia). [PDF]

open access: yesPLoS ONE, 2015
Modern crocodylians, including Alligator mississippiensis, have a greatly elaborated system of pneumatic sinuses invading the cranium. These sinuses invade nearly all the bones of the chondrocranium and several bony elements of the splanchnocranium, but ...
David L Dufeau, Lawrence M Witmer
doaj   +4 more sources

Biomechanical analysis and new trophic hypothesis for Riojasuchus tenuisceps, a bizarre-snouted Late Triassic pseudosuchian from Argentina [PDF]

open access: yesActa Palaeontologica Polonica, 2023
Ornithosuchids are a Late Triassic pseudosuchian archosaur group, consisting of four species (three from South America, and one from Scotland). All of them have triangular skulls with a protruding premaxilla, large nostrils, an extensive diastema in ...
JEREMÍAS R.A. TABORDA   +2 more
doaj   +1 more source

An enigmatic new archosauriform from the Carnian– Norian, Upper Triassic, Ischigualasto Formation of northwestern Argentina [PDF]

open access: yesActa Palaeontologica Polonica, 2021
In this contribution we introduce a new Late Triassic archosaur, Incertovenator longicollum gen. et sp. nov., with an unusual combination of character states that are present in certain early avemetatarsalian and pseudosuchian archosaur clades.
Imanol Yáñez   +4 more
doaj   +1 more source

The first ornithosuchid from Brazil and its macroevolutionary and phylogenetic implications for Late Triassic faunas in Gondwana [PDF]

open access: yesActa Palaeontologica Polonica, 2020
rnithosuchidae is one of the most enigmatic clades of Triassic pseudosuchians. The group is composed by three carnivorous species that were excavated from Upper Triassic beds of Scotland and Argentina.
Rodrigo T. Müller   +3 more
doaj   +1 more source

The craniomandibular anatomy of the early archosauriform Euparkeria capensis and the dawn of the archosaur skull [PDF]

open access: yesRoyal Society Open Science, 2020
Archosauria (birds, crocodilians and their extinct relatives) form a major part of terrestrial ecosystems today, with over 10 000 living species, and came to dominate the land for most of the Mesozoic (over 150 Myr) after radiating following the Permian ...
Roland B. Sookias   +7 more
doaj   +1 more source

Vertebral morphometrics and lung structure in non-avian dinosaurs [PDF]

open access: yesRoyal Society Open Science, 2018
The lung-air sac system of modern birds is unique among vertebrates. However, debate surrounds whether an avian-style lung is restricted to birds or first appeared in their dinosaurian ancestors, as common osteological correlates for the respiratory ...
Robert J. Brocklehurst   +2 more
doaj   +1 more source

A new archosauriform (Reptilia: Diapsida) from the Manda beds (Middle Triassic) of southwestern Tanzania. [PDF]

open access: yesPLoS ONE, 2013
BackgroundArchosauria and their closest relatives, the non-archosaurian archosauriforms, diversified in the Early and Middle Triassic, soon after the end-Permian extinction. This diversification is poorly documented in most Lower and Middle Triassic rock
Sterling J Nesbitt   +2 more
doaj   +1 more source

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