Results 71 to 80 of about 1,292 (190)
Palaeodiversity and formation counts:Redundancy or bias? [PDF]
, 2015 A key question in palaeontology is whether the fossil record taken at face value is adequate to represent true patterns of diversity through time.
Benton, Michael J.
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Papers in Palaeontology, Volume 11, Issue 6, November/December 2025.Abstract ‘Microsaurs’ are problematic late Palaeozoic tetrapods that have been grouped with reptiles on the one hand, or regarded as close relatives of amniotes on the other. Early phylogenetic analyses that included broadly sampled tetrapod taxa placed ‘microsaurs’ as close relatives of amniotes. Several recent phylogenetic analyses have, by contrast,
Robert R. Reisz, Sean P. Modesto
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Palaeontology, Volume 68, Issue 5, September/October 2025.Abstract The Upper Triassic Santa Maria Supersequence in Brazil has yielded numerous cynodont species, including derived probainognathians, which are relevant for understanding the cynodont–mammal transition. One of these cynodonts is Brasilodon quadrangularis, considered to be the sister taxon to Mammaliaformes due to a suite of apomorphic features in
Charles J. Salcido +8 more
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FACETS, 2017 Body size is one of the most important characteristics of an organism, impacting a great variety of ecological characteristics. The influence of diet on body size has received considerable attention, with previous studies suggesting a greater tendency ...
Neil Brocklehurst, Kirstin S. Brink
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Callibrachion and Datheosaurus, two historical and previously mistaken basal caseasaurian synapsids from Europe [PDF]
Acta Palaeontologica Polonica, 2016 This study represents a re-investigation of two historical fossil discoveries, Callibrachion gaudryi (Artinskian of France) and Datheosaurus macrourus (Gzhelian of Poland), that were originally classified as haptodontine-grade sphenacodontians and have ...
Frederik Spindler +2 more
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The taxonomic status of Parathrinaxodon proops (Therapsida: Cynodontia), with comments on the morphology of the palate in basal cynodonts [PDF]
, 2005 The holotype and only specimen of Parathrinaxodon proops, a cynodont from the Upper Permian Kawinga Formation, Tanzania, is redescribed. Upper postcanines from the middle of the tooth row are ovoid in outline, presenting a large main cusp and tiny ...
Abdala, Fernando, Allinson, Matthew
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The quality of the fossil record of anomodonts (Synapsida, Therapsida)
Comptes 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
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Cautionary tales on the use of proxies to estimate body size and form of extinct animals
Ecology and Evolution, Volume 14, Issue 9, September 2024.Reconstructing the body size and form of extinct animals is of vital importance to our understanding of macroevolution and palaeontology. This is often done using anatomical proxies where extinct species are known only from fragmentary remains. However, there are many limitations influencing the selection of proxy taxa that are frequently overlooked ...
Joel H. Gayford +7 more
wiley +1 more source
Positive allometry and the prehistory of sexual selection [PDF]
, 2010 The function of the exaggerated structures that adorn many fossil vertebrates remains largely unresolved. One recurrent hypothesis is that these elaborated traits had a role in thermoregulation. This orthodoxy persists despite the observation that traits
Humphries, Stuart +4 more
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Size and shape heterodonty in the early Permian synapsid Mesenosaurus efremovi
Journal of Anatomy, Volume 245, Issue 1, Page 181-196, July 2024.Here we present the first evidence of functional differentiation in the dentition of an early synapsid, Mesenosaurus efremovi. Mesenosaurus is the first member of this large and successful clade to exhibit a type of dental heterodonty that combines size and morphological (shape) variation of the tooth crowns, including variation and distribution of the
Tea Maho +3 more
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