Results 11 to 20 of about 303 (138)

The histology of rhynchosaur (Diapsida, Archosauromorpha) ankylothecodonty. [PDF]

open access: yesJ Anat
AbstractThe study of the connection between the teeth and the jaw is important for understanding the palaeobiology of vertebrates, but inconsistent terminology and incomplete sampling have made it difficult to assess the evolutionary significance of some of the related characters.
Mestriner G   +7 more
europepmc   +4 more sources

Growth patterns and life-history strategies in Placodontia (Diapsida: Sauropterygia) [PDF]

open access: yesRoyal Society Open Science, 2015
Placodontia is a clade of durophagous, near shore marine reptiles from Triassic sediments of modern-day Europe, Middle East and China. Although much is known about their primary anatomy and palaeoecology, relatively little has been published regarding ...
Nicole Klein   +3 more
doaj   +9 more sources

El registro fósil de plesiosaurios (Diapsida, Sauropterygia) en el Perú

open access: yesRevista Peruana de Biología, 2021
Se realiza un recuento de los registros de plesiosaurios de Perú y se describe material referido a plesiosauria depositado en el Museo de Historia Natural de la UNMSM.El registro de plesiosaurios de Perú se extiende entre el Valanginiano-Hauteriviano ...
Ivan Meza-Velez, José O'Gorman
doaj   +4 more sources

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   +5 more sources

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   +4 more sources

A new stem saurian reptile from the late Permian of South Africa and insights into saurian evolution [PDF]

open access: yesSwiss Journal of Palaeontology
The evolutionary radiation of diapsid reptiles that includes all extant and most extinct reptiles is well-represented in the Mesozoic and Cenozoic fossil records, however, the earliest stages recorded in the Paleozoic Era are limited to comparatively few
Ethan Dean Mooney   +2 more
doaj   +2 more sources

A new sphenodontian (Diapsida: Lepidosauria) from the Upper Triassic (Norian) of Germany and its implications for the mode of sphenodontian evolution [PDF]

open access: yesBMC Ecology and Evolution
The Arnstadt Formation of Saxony-Anhalt, Germany has yielded some of Germany’s most substantial finds of Late Triassic tetrapods, including the sauropodomorph Plateosaurus and the stem-turtle Proganochelys quenstedti. Here, we describe an almost complete
Lisa S. Freisem   +3 more
doaj   +2 more sources

Trifold origin of the reptilian ear ossicle and its relation to the evolutionary modification of the temporal skull region. [PDF]

open access: yesJ Anat
The columella‐complex in reptile middle ears involves the footplate, columella shaft, and extracolumella. The latter is partly of quadrate developmental origin, whereas the footplate derives from the mesodermal otic capsule, the shaft and another part of the extracolumella from the hyoid arch.
Werneburg I, Bronzati M.
europepmc   +2 more sources

The holotype of the basal archosauromorph Prolacerta broomi revisited [PDF]

open access: yesActa Palaeontologica Polonica, 2023
Prolacerta broomi is one of the most important of fossil reptiles. First considered as one of the earliest members of squamates, this basal archosauromorph has been used as a model for diapsid morphological evolution ever since its discovery, playing ...
GABRIELA SOBRAL
doaj   +1 more source

The evolution of muscle spindles. [PDF]

open access: yesExp Physiol
Abstract Muscle spindles are stretch‐sensitive mechanoreceptors found in the skeletal muscles of most four‐limbed vertebrates. They are unique amongst sensory receptors in the ability to regulate their sensitivity by contraction of the intrafusal muscle fibres on which the sensory endings lie.
Banks RW, Proske U.
europepmc   +2 more sources

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