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Anatomy and relationships of the South African gorgonopsian Arctops (Therapsida, Theriodontia)
Author(s) -
Kammerer Christian F.
Publication year - 2017
Publication title -
papers in palaeontology
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.827
H-Index - 15
ISSN - 2056-2802
DOI - 10.1002/spp2.1094
Subject(s) - biology , sister group , clade , taxon , phylogenetic tree , zoology , permian , genus , morphology (biology) , taxonomy (biology) , evolutionary biology , paleontology , biochemistry , structural basin , gene
The gorgonopsian genus Arctops from the late Permian of South Africa is revised and redescribed. The nominal species Arctops kitchingi and Arctops watsoni are found to be junior synonyms of the type species Arctops willistoni . A well‐prepared specimen previously referred to Lycaenops angusticeps and additional, previously undescribed specimens are also referred to A . willistoni . The vomerine morphology of Arctops is highly distinctive, supporting previous work highlighting the taxonomic importance of this element. Arctops is restricted to the Cistecephalus Assemblage Zone of the South African Beaufort Group. Inclusion of Arctops in a phylogenetic analysis of gorgonopsian relationships recovers it as the sister‐taxon of Smilesaurus ferox , with the clade composed of Arctops + Smilesaurus positioned outside the Rubidgeinae.