Origin of the Triassic Dicynodonts (Reptilia: Synapsida)
1964; Nature Portfolio; Volume: 201; Issue: 4920 Linguagem: Inglês
10.1038/201733a0
ISSN1476-4687
Autores Tópico(s)Amphibian and Reptile Biology
ResumoSO far, workers on the Triassic dicynodonts1–3 have not been able to indicate how this group originated. However, Camp2 has enumerated twelve characters which he thought would be present in their ancestor. Eleven of these characters are found in the Eo-triassic genus Lystrosaurus4. The twelfth, concerning the presence of a cleithral groove, has been shown5 to be not significant. The so-called cleithral grooves found on the scapulæ of Triassic dicynodonts can be better interpreted as pre-spinous fossæ.
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