Pylaecephalidae

"Robertiidae" redirects here. For the nematode family Robertiidae Travassos & Kloss, 1961, see Traklosiidae.

Pylaecephalidae Temporal range: Permian
Fossil of Diictodon
Scientific classification
Kingdom:	Animalia
Phylum:	Chordata
Clade:	Synapsida
Clade:	Therapsida
Clade:	† 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

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