... taille et abondance étaient les diadectidés herbivores. Il était peu probable qu’il y avait aussi de grands prédateurs. [Traduit par la Rédaction] Amniota Synapsida Osborn 1903 Eupelycosauria Kemp 1982 Family Sphenacodontidae Williston 1912 Genus Dimetrodon Cope 1878...

... of Sphenacodon ferox of the family Sphenacodontidae. As Romer and Price noted, features originally cited as unique to the holotype are attributable to imperfect restoration. Although correctly recognizing S . puercensis as belonging to the suborder Sphenacodontia, they mistakenly assigned it to the family...

...Figure 2.  Species and genus-level taxic diversity curves and phylogenetic diversity curves (gray dashed-dotted) of Ophiacodontidae (A), Varanopidae (B), Edaphosauridae (C), Sphenacodontidae (D), and Caseasauria (E). Timescale representing millions of years ago appears at the bottom. ...

... ; Sidor and Hopson 1995 ), “ Sphenacodon ” britannicus ( Eberth 1985 ; Paton 1974 ), and B. borealis . There are few diagnostic cranial differences within Sphenacodontidae, which has confounded attempts to determine the relationships of B. borealis within this clade ( Reisz 1986 ). Given that B...

... vertebrate taxa in the San Angelo Formation. None of the taxa shown here extend beyond the Olenekian. Geological timescale Taxa Series Stages Tupilakosauridae Moradisaurini Caseinae Sphenacodontidae Triassic Olenekian ? Induan X Lopingian Changhsingian X X...

... synapsids, contrasts strongly with the triangular cross section seen in our specimens, which is a feature of more advanced sphenacodontid groups. Family Sphenacodontidae Williston, 1912 Sphenacodontidae Indet. ( Figs. 9A–D ) One complete, and twelve incomplete, terminal phalanges...

..., Sphenacodontidae) and therapsids (Biarmosuchia, Dinocephalia, Anomodontia, Gorgonopsia, Therocephalia, nonmammalian Cynodontia) and represents the majority of well-preserved synapsid whole-cranium fossils. We used this data set to test for a CREA-like pattern in “pelycosaurs” as well as in each major therapsid...

... , A. C. , Henrici , S. S. , Sumida , T. , and Martens , 2000b , Early Permian bipedal reptile : Science , 290 . 969 – 972 . Berman , D. S. , R. R. , Reisz , T. , Martens , A. C. , and Henrici , 2001 , A new species of Dimetrodon (Synapsida: Sphenacodontidae) from...

..., Caseasauria (Caseidae and Eothyrididae), Ophiacodontidae, Edaphosauridae and Sphenacodontidae, Varanopidae has the longest known fossil record. We would like to thank Ms. D. Scott for the excellent preparation and illustrations of the holotype and only known specimen. We also thank Dr. H.-P. Schultze...

...) considered Delorhynchus to be a basal parareptile, and that interpretation was accepted by Evans et al. (2009 , table 2 ). b Thrausmosaurus serratidens was described by Fox (1962) as a pelycosaur, within the family Sphenacodontidae. Most subsequent authors continued to accept T. serratidens...

... life reacted to freezing temperatures. Maroon sediments preserve remains of a diverse assemblage of semiterrestrial and terrestrial organisms including sphenophytes and conifers, arthropods, amphibians (Temnospondyli, Diadectomorpha) and amniotes (Araeoscelidae, Sphenacodontidae, Varanopidae) ( Figs. 2...

... count. The ancestral synapsid probably possessed two sacral vertebrae (Romer 1956 ; LeBlanc and Reisz 2014 ), with Therapsida and some non-therapsid lineages (e.g., Caseidae, Edaphosauridae, Sphenacodontidae) incorporating a third sacral from the caudal series (Reisz 1986 ; LeBlanc and Reisz 2014...

... , Long bone histology indicates sympatric species of Dimetrodon (Lower Permian, Sphenacodontidae) : Earth and Environmental Science Transactions of the Royal Society of Edinburgh , v. 103 , p. 1 – 20 . Spindler , F...

... al. ( 2019 ) proposed a possible preliminary attribution to the carnivorous group of Sphenacodontidae. A detailed study of the new specimen could provide important information, considering that sphenacodontids are essentially known from the Permian beds of the south-western United States, and the new...

... , and D. Scott . 1992 . The cranial anatomy and relationships of Secodontosaurus , an unusual mammal-like reptile (Synapsida: Sphenacodontidae) from the Early Permian of Texas . Zoological Journal of the Linnean Society , 104 : 127 – 184 . Reisz , R. R. , D. W. Dilkes , and D. S...

... Pennsylvanian Rock Lake Shale near Garnett, Kansas . Canadian Journal of Earth Sciences , 23 : 77 - 91 . Reisz , R. R. , D. S. Berman , and D. Scott . 1992 . The cranial anatomy and relationships of Secodontosaurus , an unusual mammal-like reptile (Synapsida: Sphenacodontidae) from...

.... R. 1986 . Pelycosauria. Handbuch der Paleoherpetologie . Teil 17A , Fisher , Stuttgart , 102 p. Reisz , R. R. , D. Berman , and D. Scott . 1992 . The cranial anatomy and relationships of Secodontosaurus , an unusual mammal-like reptile (Synapsida: Sphenacodontidae...

.... Winkelhorst H. 2013 . Long bone histology indicates sympatric species of Dimetrodon (Lower Permian, Sphenacodontidae) . Earth and Environmental Science Transactions of the Royal Society of Edinburgh 103 : 217 – 236...