Cistecephalidae Broom, 1903
publication ID |
https://doi.org/ 10.5281/zenodo.186035 |
DOI |
https://doi.org/10.5281/zenodo.6222278 |
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https://treatment.plazi.org/id/03EE87A8-9612-0F1C-DBAF-FD90FB36FB04 |
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Plazi |
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Cistecephalidae Broom, 1903 |
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Definition: All taxa more closely related to Cistecephalus microrhinus Owen, 1876 , than Myosaurus gracilis Haughton, 1917 , or Kingoria nowacki (von Huene, 1942) Cox, 1959.
Taxonomic comments: The monophyly of Cistecephalidae , containing the highly specialized, fossorial dicynodonts Cistecephalus Owen, 1876 , Cistecephaloides Cluver, 1974 , and Kawingasaurus Cox, 1972 , has never been called into question. Phylogenetic analyses including all three of these taxa (Angielczyk 2007; Fröbisch 2007; Fröbisch & Reisz 2008) strongly support this grouping.
Revised diagnosis: Autapomorphies of Cistecephalidae recognized in common by Angielczyk (2007), Fröbisch (2007), and Fröbisch & Reisz (2008) are: (1) preparietal absent; (2) postparietal contributes to the intertemporal skull roof; (3) interpterygoid vacuity absent. Extensive postcranial material is not known for Cistecephaloides , but Angielczyk (2007) recognized several postcranial synapomorphies of Cistecephalus and Kawingasaurus : (1) ossified cleithrum present; (2) acromion process absent; (3) procoracoid participates in formation of glenoid; (4) insertion of M. subcoracoscapularis on humerus extended into a distinct process; (5) trochlea and capitellum distinct.
No known copyright restrictions apply. See Agosti, D., Egloff, W., 2009. Taxonomic information exchange and copyright: the Plazi approach. BMC Research Notes 2009, 2:53 for further explanation.
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