The postcranial skeletal anatomy of the therocephalian Regisaurus (Therapsida: Regisauridae) and its utilization for biostratigraphic correlation
Date
2007
Authors
Fourie, Heidi
Rubidge, Bruce S.
Journal Title
Journal ISSN
Volume Title
Publisher
BERNARD PRICE INSTITUTE FOR PALAEONTOLOGICAL RESEARCH
Abstract
The postcranial morphology of the therocephalian genus Regisaurus from the Lystrosaurus Assemblage Zone of South Africa is
described. The remarkably complete state of preservation of the vertebral column has, for the first time, provided a full vertebral count
for a therocephalian and demonstrates that it is possible to differentiate between cervical, thoracic, lumbar, sacral and caudal vertebrae.
It is demonstrated that some postcranial elements can be used to identify particular therocephalian groups and will be of use in
biostratigraphic studies in areas where cranial remains have not been found. A slender scapula, low scapular ridge, shallow scapular
depression, short and broad interclavicle, oval sternum, and a small obturator foramen are characteristics of therocephalians known
from the Cistecephalus, Dicynodon and Lystrosaurus assemblage zones of the Beaufort Group of South Africa.