Results 31 to 40 of about 581 (152)
The postcranial anatomy of Gorgonops torvus (Synapsida, Gorgonopsia) from the late Permian of South Africa [PDF]
PeerJ, 2023 Gorgonopsians are among the most recognizable groups of synapsids from the Permian period and have an extensive but mostly cranial fossil record. By contrast, relatively little is known about their postcranial anatomy. Here, we describe a nearly complete,
Eva-Maria Bendel +3 more
doaj +2 more sources
Frontiers in Ecology and Evolution, 2020 Therocephalia is one of the major therapsid clades and ranges from the middle Permian to Middle Triassic. The earliest therocephalians were large-bodied predators whose fossils are common in middle Permian rocks of South Africa, but have received little ...
Luisa C. Pusch +8 more
doaj +1 more source
The origins of the cochlea and impedance matching hearing in synapsids [PDF]
Acta Palaeontologica Polonica, 2016 The origin of tympanic hearing in early synapsids is still controversial, because little is known about their inner ear and the function of their sound conducting apparatus. Here I describe the earliest known tympanic ear in the synapsid lineage, the ear
Michael Laass
doaj +1 more source
New tools suggest a middle Jurassic origin for mammalian endothermy
BioEssays, Volume 44, Issue 4, April 2022., 2022 We synthesise recent developments to revise understanding of when, why, and how mammalian endothermy evolved. Modern levels of mammalian endothermy likely first appear in Jurassic early crown mammals or their close relatives, as part of a series of macroevolutionary phases reflecting shifting ecological/environmental pressures acting on various aspects
Elis Newham +2 more
wiley +1 more source
A new therocephalian (Gorynychus masyutinae gen. et sp. nov.) from the Permian Kotelnich locality, Kirov Region, Russia [PDF]
PeerJ, 2018 A new therocephalian taxon (Gorynychus masyutinae gen. et sp. nov.) is described based on a nearly complete skull and partial postcranium from the Permian Kotelnich locality of Russia. Gorynychus displays an unusual mixture of primitive (“pristerosaurian”
Christian F. Kammerer, Vladimir Masyutin
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Biological Reviews, Volume 96, Issue 5, Page 2229-2257, October 2021., 2021 ABSTRACT The morphology of the temporal region in the tetrapod skull traditionally has been a widely discussed feature of vertebrate anatomy. The evolution of different temporal openings in Amniota (mammals, birds, and reptiles), Lissamphibia (frogs, salamanders, and caecilians), and several extinct tetrapod groups has sparked debates on the ...
Pascal Abel, Ingmar Werneburg
wiley +1 more source
The Anatomical Record, Volume 304, Issue 3, Page 570-583, March 2021., 2021 Abstract Here we describe the histology and microanatomy of vertebral centra of the iconic pelycosaur‐grade synapsids Edaphosaurus boanerges and Dimetrodon spp. Vertebrae from different axial positions and, in the case of Dimetrodon, from different ontogenetic stages were selected. For the histological description, we produced histological petrographic
Amin Agliano +2 more
wiley +1 more source
Gorgonopsian therapsids (Nochnitsa gen. nov. and Viatkogorgon) from the Permian Kotelnich locality of Russia [PDF]
PeerJ, 2018 The early evolution of gorgonopsians is poorly understood. New material from the Kotelnich locality in Russia expands our knowledge of middle/earliest late Permian gorgonopsians from Laurasia.
Christian F. Kammerer, Vladimir Masyutin
doaj +2 more sources
An early geikiid dicynodont from the Tropidostoma Assemblage Zone (late Permian) of South Africa [PDF]
PeerJ, 2017 Based on specimens previously identified as Tropidostoma, a new taxon of dicynodont (Bulbasaurus phylloxyron gen. et sp. nov.) from the Karoo Basin of South Africa is described.
Christian F. Kammerer, Roger M.H. Smith
doaj +2 more sources
From sprawling to parasagittal locomotion in Therapsida: A preliminary study of historically collected museum specimens [PDF]
Vertebrate Zoology, 2022 Therapsids covered the entire spectrum of terrestrial locomotion from sprawling to parasagittal. Switching between sprawling and more erect locomotion may have been possible in earlier taxa.
Holger Preuschoft +2 more
doaj +3 more sources