|Basic info||Taxonomic history||Classification||Relationships|
|Morphology||Ecology and taphonomy||External Literature Search||Age range and collections|
It was reranked as the suborder Therocephalia by Osborn (1904), Gregory (1910), Nopcsa (1923), Kuhn (1946), Huene (1954), Kemp (1982) and Carroll (1988); it was reranked as the infraorder Therocephalia by Haughton and Brink (1954), Olson (1966) and Battail and Surkov (2000); it was reranked as the unranked clade Therocephalia by Gauthier et al. (1989), Rubidge and Sidor (2001), Abdala et al. (2008) and Huttenlocker and Smith (2017).
It was assigned to Therapsida by Broom (1913); to Theriodontia by Osborn (1904) and Nopcsa (1923); to Theromorpha by Kuhn (1946); to Theriodonta by Olson (1966); to Therosauria by Kemp (1982); to Therapsida by Gregory (1910), Huene (1954) and Carroll (1988); to Theriodontia by Haughton and Brink (1954) and Battail and Surkov (2000); to Eutheriodontia by Rubidge and Sidor (2001); to Eutherapsida by Ivakhnenko (2011); and to Therapsida by Gauthier et al. (1989), Abdala et al. (2008) and Huttenlocker and Smith (2017).
|Year||Name and author|
|1903||Therocephalia Broom p. 292|
|1904||Therocephalia Osborn p. 101|
|1907||Arnognathus Broom p. 38|
|1907||Arnognathus parvidens Broom p. 38 figs. 6 pl. III|
|1910||Therocephalia Gregory p. 464|
|1913||Arnognathus parvidens Broom|
|1913||Therocephalia Broom p. 362|
|1946||Therocephalia Kuhn p. 57|
|1954||Therocephalia Haughton and Brink p. 7|
|1954||Therocephalia Huene p. 33|
|1966||Therocephalia Olson p. 302|
|1982||Therocephalia Kemp p. 349|
|1989||Therocephalia Gauthier et al. p. 341 fig. 7|
|2000||Therocephalia Battail and Surkov p. 108|
|2001||Therocephalia Rubidge and Sidor|
|2008||Therocephalia Abdala et al. p. 1012|
|2017||Therocephalia Huttenlocker and Smith|
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If no rank is listed, the taxon is considered an unranked clade in modern classifications. Ranks may be repeated or presented in the wrong order because authors working on different parts of the classification may disagree about how to rank taxa.