Results 21 to 30 of about 332 (154)
The evolution of muscle spindles. [PDF]
Exp PhysiolAbstract 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
The enigmatic marine reptile nanchangosaurus from the lower triassic of Hubei, China and the phylogenetic affinities of Hupehsuchia. [PDF]
PLoS ONE, 2014 The study of the holotype and of a new specimen of Nanchangosaurus suni (Reptilia; Diapsida; Hupehsuchia) revealed a suite of hitherto unrecognized characters.
Xiao-hong Chen +4 more
doaj +1 more source
El registro fósil de plesiosaurios (Diapsida, Sauropterygia) en el Perú
Revista 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 +1 more source
The phylogenetic relationships of basal archosauromorphs, with an emphasis on the systematics of proterosuchian archosauriforms [PDF]
PeerJ, 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
The pseudosuchian record in paleohistology: A small review. [PDF]
Anat Rec (Hoboken)Abstract Archosauria originated around the Earth's largest biotic crisis that severely affected all ecosystems globally, the Permotriassic Mass extinction event, and comprises two crown‐group lineages: the bird‐lineage and the crocodylian lineage. The bird lineage includes the iconic pterosaurs, as well as dinosaurs and birds, whereas the crocodylian ...
Scheyer TM.
europepmc +2 more sources
Diversity of diapsid fifth metatarsals from the Lower Triassic karst deposits of Czatkowice, southern Poland—functional and phylogenetic implications [PDF]
Acta Palaeontologica Polonica, 2018 Three morphotypes of the fifth metatarsal (MttV), one of the most informative bones of the postcranium, have been described herein from the Early Triassic karst deposits of the Czatkowice locality (Southern Poland).
Magdalena Borsuk-Białynicka
doaj +1 more source
Soft tissues influence nasal airflow in diapsids: Implications for dinosaurs
Journal of Morphology, Volume 284, Issue 9, September 2023., 2023 Bony‐bounded airway of the theropod, Majungasaurus, showing multiple regions of the nasal passage where comparative CFD studies can reliably infear soft‐tissue locations. Abstract The nasal passage performs multiple functions in amniotes, including olfaction and thermoregulation.
Jason M. Bourke, Lawrence M. Witmer
wiley +1 more source
Papers in Palaeontology, Volume 9, Issue 5, September/October 2023., 2023 Abstract The late Permian reptile Youngina capensis (c. 254 Ma) is a non‐saurian neodiapsid whose anatomy has been used to represent the reptilian condition prior to the divergence of Sauria (crown‐group reptiles). However, despite being first described over 100 years ago, the anatomy of Youngina remains incompletely documented. Here we use synchrotron
Annabel K. Hunt +4 more
wiley +1 more source
Early archosauromorph remains from the Permo-Triassic Buena Vista Formation of north-eastern Uruguay [PDF]
PeerJ, 2015 The Permo-Triassic archosauromorph record is crucial to understand the impact of the Permo-Triassic mass extinction on the early evolution of the group and its subsequent dominance in Mesozoic terrestrial ecosystems.
Martín D. Ezcurra +3 more
doaj +2 more sources
Journal of Anatomy, Volume 242, Issue 5, Page 891-916, May 2023., 2023 Reptiles show great diversity of locomotion and posture. We employed phylogenetically informed statistical methods to explore their bone microanatomy. We used our models to infer the locomotion of extinct reptiles that document the different episodes of postural diversification in this clade.
Jordan Gônet +4 more
wiley +1 more source