Results 81 to 90 of about 1,118 (184)

The postcranial skeletal anatomy of the therocephalian Regisaurus (Therapsida: Regisauridae) and its utilization for biostratigraphic correlation [PDF]

open access: yes, 2007
The postcranial morphology of the therocephalian genus Regisaurus from the Lystrosaurus Assemblage Zone of South Africa is described. The remarkably complete state of preservation of the vertebral column has, for the first time, provided a full ...
Fourie, Heidi, Rubidge, Bruce S.
core  

A RE-EVALUATION OF THE SYSTEMATICS AND MORPHOLOGY OF CERTAIN ANOMODONT THERAPSIDA [PDF]

open access: yes, 1972
The cranial morphology of a number of specimens assigned to the genera Oudenodon, Rhachiocephalus, Aulacephalodon and Pelanomodon was investigated (Keyser, 1969). It was found that the internal morphology and the general structure of the skulls show
Keyser, A. W.
core  

The palatal dentition of tetrapods and its functional significance [PDF]

open access: yes, 2017
The presence of a palatal dentition is generally considered to be the primitive condition in amniotes, with each major lineage showing a tendency toward reduction. This study highlights the variation in palatal tooth arrangements and reveals clear trends
Evans, SE, Matsumoto, R
core   +1 more source

The quality of the fossil record of anomodonts (Synapsida, Therapsida)

open access: yesComptes Rendus Palevol, 2013
Abstract The quality of the fossil record of anomodont synapsids, one of the major clades of Permian–Triassic terrestrial tetrapods, is assessed. A Character Completeness Metric (CCM2) is calculated for each taxon and consecutive time intervals at a global scale and in the South African Karoo Basin.
Marcus Walther, Jörg Fröbisch
openaire   +1 more source

A new specimen of Dicynodon traquairi (Newton) (Synapsida: Anomodontia) from the Late Permian (Tartarian) of northern Scotland [PDF]

open access: yes, 2005
A recently discovered natural mould of a complete, almost undistorted, skull and lower jaw of a dicynodont (c. 237mmoverall length), in a block of Upper Permian sandstone (= Dicynodon Assemblage Zone: Hopeman Sandstone Formation) from Clashach Quarry ...
Adams, Calum   +2 more
core  

Biology, not environment, drives major patterns in maximum tetrapod body size through time [PDF]

open access: yes, 2012
Abiotic and biological factors have been hypothesized as controlling maximum body size of tetrapods and other animals through geological time. We analyse the effects of three abiotic factors—oxygen, temperature and land area—on maximum size of Permian ...
Benson, Roger B. J.   +2 more
core   +1 more source

Dentition and feeding niche of Endothiodon (Synapsida; Anomodontia). [PDF]

open access: yes, 1995
Main articleThe cranial morphology and extensive dentition of the dicynodont therapsid Endothiodon are different from those of any other dicynodont and it clearly had a different feeding niche.
Gow, C. E.   +2 more
core  

Cranial osteology and reassessment of the historically collected South African gorgonopsians FMNH UC 1513 (Lycaenops cf. L. angusticeps) and AMNH FARB 5537 (Lycaenops angusticeps)

open access: yesVertebrate Anatomy, Morphology, Palaeontology
Lycaenops contains one of the most anatomically complete gorgonopsian specimens (AMNH FARB 2240) known and is thought to represent one of the more taxonomically diverse forms, with several species historically attributed to it.
Naiomi Cookson, Arjan Mann
doaj   +1 more source

Global taxonomic diversity of anomodonts (tetrapoda, therapsida) and the terrestrial rock record across the Permian-Triassic boundary.

open access: yesPLoS ONE, 2008
The end-Permian biotic crisis (~252.5 Ma) represents the most severe extinction event in Earth's history. This paper investigates diversity patterns in Anomodontia, an extinct group of therapsid synapsids ('mammal-like reptiles'), through time and in ...
Jörg Fröbisch
doaj   +1 more source

A REVISED CLASSIFICATION OF CYNODONTS (REPTILIA; THERAPSIDA) [PDF]

open access: yes, 1972
Cynodonts are very advanced mammal-like reptiles of the Permian-Triassic which are of special interest to evolutionists because they gave rise to the Class Mammalia during Middle or Late Triassic time.
Hopson, James A., Kitching, James W.
core  

Home - About - Disclaimer - Privacy