The morphology and relationships of Youngina capensis Broom and Prolacerta broomi Parrington

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dc.contributor.authorGow, Chris E
dc.date.accessioned2015-01-09T07:20:56Z
dc.date.available2015-01-09T07:20:56Z
dc.date.issued1975
dc.description.abstractComprehensive descriptions of the osteology of Youngina capensis Broom and Prolacerta broomi Parrington are presented. New details of the braincase of Proterosuchus fergusi Broom are given as these became necessary for comparative purposes. It is suggested that the initial radiation of sauropsid reptiles was a Permian event as yet poorly documented. The phylogenetic position of Youngina forward and backward in time cannot be narrowly defined, though certain characters seem specifically to preclude it from lizard ancestry. Prolacerta, on the basis of tooth implantation, braincase morphology and postcranial anatomy is shown to be closest to the proterosuchian thecodonts. It is very definitely not concerned with lizard origins, but would on available evidence seem to be a perfectly good ancestor for the middle Triassic forms Macrocnemus and Tanystropheus which latter must cease to be regarded as lizard ancestors. We have here a rather distinct reptilian lineage which branched off from common ancestral stock just prior to the advent of archosaurs.en_ZA
dc.identifier.issn0078-8554
dc.identifier.urihttp://hdl.handle.net/10539/16290
dc.language.isoenen_ZA
dc.publisherBernard Price Institute for Palaeontological Researchen_ZA
dc.subjectThecodontiaen_ZA
dc.subjectSouth Africaen_ZA
dc.subjectsauropsidaen_ZA
dc.titleThe morphology and relationships of Youngina capensis Broom and Prolacerta broomi Parringtonen_ZA
dc.typeArticleen_ZA
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Volume 18 1975