Results 11 to 20 of about 290 (172)

Correction: Neuroanatomy of the Marine Jurassic Turtle Plesiochelys etalloni (Testudinata, Plesiochelyidae). [PDF]

open access: yesPLoS ONE, 2019
[This corrects the article DOI: 10.1371/journal.pone.0069264.].
Ariana Paulina-Carabajal   +3 more
doaj   +2 more sources

The Triassic turtle of Thailand - revision of 'Proganochelys' ruchae. [PDF]

open access: yesPLoS ONE
True turtles (Testudinata) appeared in the Norian (Late Triassic) and quickly attained a worldwide distribution and relatively high diversity. Their remains are currently known from that time from Asia, Europe, North America, and South America, and ...
Tomasz Szczygielski   +4 more
doaj   +2 more sources

Still slow, but even steadier: an update on the evolution of turtle cranial disparity interpolating shapes along branches [PDF]

open access: yesRoyal Society Open Science, 2017
In a previous study, we estimated the cranial disparity of turtles (Testudinata) through time using geometric morphometric data from both terminal taxa and hypothetical ancestors to compensate for temporal gaps in the fossil record.
Christian Foth   +2 more
doaj   +2 more sources

The evolution of dermal shield vascularization in Testudinata and Pseudosuchia: phylogenetic constraints versus ecophysiological adaptations [PDF]

open access: yesPhilosophical Transactions of the Royal Society B: Biological Sciences, 2020
Studies on living turtles have demonstrated that shells are involved in the resistance to hypoxia during apnea via bone acidosis buffering; a process which is complemented with cutaneous respiration, transpharyngeal and cloacal gas exchanges in the soft-shell turtles.
François Clarac   +4 more
openaire   +8 more sources

Shell biomechanics suggests an aquatic palaeoecology at the dawn of turtle evolution [PDF]

open access: yesScientific Reports
The turtle shell is a remarkable structure that has intrigued not only evolutionary biologists but also engineering and material scientists because of its multi-scale complexity and various functions.
Gabriel S. Ferreira   +4 more
doaj   +2 more sources

A revised turtle assemblage from the Upper Cretaceous Menefee Formation (New Mexico, North America) with evolutionary and paleobiostratigraphic implications [PDF]

open access: yesPeerJ
The middle Campanian Menefee Formation (Fm.) of the San Juan Basin of New Mexico is a relatively understudied terrestrial deposit in southern Laramidia preceding the fossil-rich upper Campanian Fruitland and Kirtland formations that have been studied for
Brent Adrian   +2 more
doaj   +3 more sources

Shell variability in the stem turtles Proterochersis spp. [PDF]

open access: yesPeerJ, 2018
Background Turtle shells tend to exhibit frequent and substantial variability, both in bone and scute layout. Aside from secondary changes, caused by diseases, parasites, and trauma, this variability appears to be inherent and result from stochastic or ...
Tomasz Szczygielski   +2 more
doaj   +2 more sources

A nomenclature for fossil and living turtles using phylogenetically defined clade names

open access: yesSwiss Journal of Palaeontology, 2021
Over the last 25 years, researchers, mostly paleontologists, have developed a system of rank-free, phylogenetically defined names for the primary clades of turtles.
Walter G. Joyce   +14 more
doaj   +1 more source

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 redescription of the Late Jurassic (Tithonian) turtle Uluops uluops and a new phylogenetic hypothesis of Paracryptodira

open access: yesSwiss Journal of Palaeontology, 2021
We study the Late Jurassic (Tithonian) turtle Uluops uluops using micro-computed tomography scans to investigate the cranial anatomy of paracryptodires, and provide new insights into the evolution of the internal carotid artery and facial nerve systems ...
Yann Rollot   +2 more
doaj   +1 more source

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