Pylaecephalidae

Pylaecephalidae; Temporal range: Permian
	Fossil of Diictodon
Scientific classification
Domain:	Eukaryota
Kingdom:	Animalia
Phylum:	Chordata
Clade:	Synapsida
Clade:	Therapsida
Suborder:	†Anomodontia
Clade:	†Dicynodontia
Family:	†Pylaecephalidae; van Hoepen, 1934
Type genus
	†Pylaecephalus; Van Hoepen, 1934
Genera
	†Diictodon; †Eosimops; †Prosictodon; †Robertia;
Synonyms
	Diictodontidae Cluver and King, 1983; Robertiidae Cluver and King, 1983;

Pylaecephalidae is a family of dicynodont therapsids that includes Diictodon, Robertia, and Prosictodon from the Permian of South Africa. Pylaecephalids were small burrowing dicynodonts with long tusks. The family was first named in 1934 and was redefined in 2009.^[1] Diictodontidae and Robertiidae are considered junior synonyms of Pylaecephalidae;^[2] although Pylaecephalus itself is considered a junior synonym of Diictodon,^[3] the name Pylaecephalidae predates these names and therefore takes priority.^[1]

Phylogeny

Below is a cladogram modified from Angielczyk et al. (2021):^[4]

Pylaecephalidae

	Diictodon

	Prosictodon

	Eosimops

	Robertia

References

^ ^a ^b Kammerer, C.F.; Angielczyk, K.D. (2009). "A proposed higher taxonomy of anomodont therapsids" (PDF). Zootaxa. 2018: 1–24.
^ Kenneth D. Angielczyk; Bruce S. Rubidge (2010). "A new pylaecephalid dicynodont (Therapsida, Anomodontia) from the Tapinocephalus Assemblage Zone, Karoo Basin, Middle Permian of South Africa". Journal of Vertebrate Paleontology. 30 (5): 1396–1409. Bibcode:2010JVPal..30.1396A. doi:10.1080/02724634.2010.501447. S2CID 129846697.
^ Sullivan, C., & Reisz, R. R. (2005). CRANIAL ANATOMY AND TAXONOMY OF THE LATE PERMIAN DICYNODONT DIICTODON. Annals of Carnegie Museum, 74(1), 45–75.
^ Angielczyk, K. D.; Liu, J.; Yang, W. (2021). "A Redescription of Kunpania scopulusa, a Bidentalian Dicynodont (Therapsida, Anomodontia) from the ?Guadalupian of Northwestern China". Journal of Vertebrate Paleontology. 41: e1922428. Bibcode:2021JVPal..41E2428A. doi:10.1080/02724634.2021.1922428. S2CID 236406006.

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[KA09-1] Kammerer, C.F.; Angielczyk, K.D. (2009). "A proposed higher taxonomy of anomodont therapsids" (PDF). Zootaxa. 2018: 1–24.

[ar2010-2] Kenneth D. Angielczyk; Bruce S. Rubidge (2010). "A new pylaecephalid dicynodont (Therapsida, Anomodontia) from the Tapinocephalus Assemblage Zone, Karoo Basin, Middle Permian of South Africa". Journal of Vertebrate Paleontology. 30 (5): 1396–1409. Bibcode:2010JVPal..30.1396A. doi:10.1080/02724634.2010.501447. S2CID 129846697.

[sullivan2005-3] Sullivan, C., & Reisz, R. R. (2005). CRANIAL ANATOMY AND TAXONOMY OF THE LATE PERMIAN DICYNODONT DIICTODON. Annals of Carnegie Museum, 74(1), 45–75.

[Angielczyk2021-4] Angielczyk, K. D.; Liu, J.; Yang, W. (2021). "A Redescription of Kunpania scopulusa, a Bidentalian Dicynodont (Therapsida, Anomodontia) from the ?Guadalupian of Northwestern China". Journal of Vertebrate Paleontology. 41: e1922428. Bibcode:2021JVPal..41E2428A. doi:10.1080/02724634.2021.1922428. S2CID 236406006.

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