Sphenacodontia is a stem-based clade of derived synapsids. It was defined by Amson and Laurin (2011) as "the largest clade that includes Haptodus baylei...
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earlier synapsids commonly called "pelycosaurs", specifically within the Sphenacodontia, more than 279.5 million years ago. They replaced the pelycosaurs as...
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evolutionary gradation from primitive synapsid to early therapsid. The clade Sphenacodontia is used to designate the monophyletic group that includes sphenacodontids...
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successively more basal clades such as Theriodontia, Therapsida and Sphenacodontia: Most uncertainty in the phylogeny of synapsids lies among the earliest...
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considered more basal synapsids, falling outside clade Sphenacodontia. Within Sphenacodontia is the group Sphenacodontoidea, which in turn contains Sphenacodontidae...
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Varanopidae Family Ophiacodontidae Family Edaphosauridae Infraorder Sphenacodontia Family Sphenacodontidae Order Therapsida Evolution of mammals List of...
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†Ophiacodontidae Haptodontiformes Spindler et al., 2018 †Ianthodon †Milosaurus †Kenomagnathus Sphenacomorpha Ivakhnenko, 2003 †Edaphosauridae Sphenacodontia...
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2016. Morphological description and taxonomic status of (Synapsida: Sphenacodontia). Freiberger Forschungshefte C550(23): 1–57. https://www.researchgate...
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utoronto. Archived from the original on March 6, 2005. "Synapsida: Sphenacodontia: Secodontosaurus". Palaeos. Archived from the original on April 23,...
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and taxonomic status of Palaeohatteria and Pantelosaurus (Synapsida: Sphenacodontia). Freiberger Forschungshefte C550(23): 1–57. https://www.researchgate...
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134–138. doi:10.1080/02724634.1994.10011544. Spindler, F. 2015. The basal Sphenacodontia - systematic revision and evolutionary implications. Ph.D. thesis, Technische...
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such as varanopids and eothyridids. Ianthodon belongs to the clade Sphenacodontia within the clade Sphenacomorpha. Ianthodon has been considered the basalmost...
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Frederik (2020). "The skull of Tetraceratops insignis (Synapsida, Sphenacodontia)" (PDF). Palaeovertebrata. 43 (1): e1. doi:10.18563/pv.43.1.e1. Sidor...
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Animalia Phylum: Chordata Clade: Synapsida Clade: Sphenacomorpha Clade: Sphenacodontia Clade: Pantherapsida Clade: Sphenacodontoidea Marsh, 1878 Clades †Shashajaia...
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Roberta Paton in 1974. In his 2015 dissertation revising the basal Sphenacodontia, Frederik Spindler demonstrated that H. garnettensis and H. grandis...
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Raranimus shares a number of features with later therapsids and ancestral Sphenacodontia. The skull consists of a well preserved rostrum. The teeth suggest a...
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113–120. doi:10.4202/app.2010.0039. "Palaeos Vertebrates Synapsida: Sphenacodontia". Michel Laurin (1994). "Re-evaluation of Cutleria wilmarthi, an Early...
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of Varanopidae within Synapsida and considered them as the suborder Sphenacodontia. Most phylogenetic analyses have place Varanopidae as a basal member...
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first being Macromerion. Since then the assignment of Milosaurus to Sphenacodontia has been refuted. The name Milosaurus mccordi refers to Milo Flynn and...
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