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
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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Decoupling of morphological disparity and taxic diversity during the adaptive radiation of anomodont therapsids [PDF]
, 2013 Adaptive radiations are central to macroevolutionary theory. Whether triggered by acquisition of new traits or ecological opportunities arising from mass extinctions, it is debated whether adaptive radiations are marked by initial expansion of taxic ...
Anderson MJ +7 more
core +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
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Morphological evolution of the mammalian jaw adductor complex [PDF]
, 2016 The evolution of the mammalian jaw during the transition from non-mammalian synapsids to crown mammals is a key event in vertebrate history and characterised by the gradual reduction of its individual bones into a single element and the concomitant ...
Abdala +98 more
core +4 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
Análisis diagenético de tetrápodos del Triásico Superior, Grupo Puesto Viejo, Argentina [PDF]
, 2016 The Puesto Viejo Group crops out in the San Rafael Block, southwest Mendoza, Argentina. This group is an important unit for the knowledge theTriassic faunas.
de la Fuente, Marcelo Saul +3 more
core +1 more source
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
The sixth sense in mammalian forerunners: Variability of the parietal foramen and the evolution of the pineal eye in South African Permo-Triassic eutheriodont therapsids [PDF]
Acta Palaeontologica Polonica, 2016 In some extant ectotherms, the third eye (or pineal eye) is a photosensitive organ located in the parietal foramen on the midline of the skull roof. The pineal eye sends information regarding exposure to sunlight to the pineal complex, a region of the ...
Julien Benoit +3 more
doaj +1 more source
Middle ear structures in the Permian Glanosuchus sp. (Therocephalia, Therapsida), based on thin sections [PDF]
Fossil Record, 2002 Transverse sections of the skull of the Permian therocephalian Glanosuchus sp. were studied with regard to the structures of the middle ear region. It is generally accepted that most of the skeletal elements of the mammalian middle ear are derived from ...
W. Maier, J. van den Heever
doaj +3 more sources