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A primitive anomodont therapsid from the base of the Beaufort Group (Upper Permian) of South Africa

Identifieur interne : 00A377 ( Main/Exploration ); précédent : 00A376; suivant : 00A378

A primitive anomodont therapsid from the base of the Beaufort Group (Upper Permian) of South Africa

Auteurs : Bruce S. Rubidge [Afrique du Sud] ; James A. Hopson [États-Unis]

Source :

RBID : ISTEX:0EC3DF88FFB0B3534E751317F1D477FDD134193B

English descriptors

Abstract

Abstract: Patranomodon nyaphulii, known from a nearly complete skull, lower jaw and partial postcranial skeleton, is morphologically the most primitive anomodont therapsid yet discovered. It is from theEodicynodonAssemblage Zone, the lowest biozone of the Beaufort Group of South Africa, which has a primitive therapsid fauna comparable with that of the Russian Zone I.Patranaomodonis primitive with respect to other anomodonts in having short palatal exposure of the premaxilla, an unreduced tabular, a slit-like interpterygoidal vacuity, a screw-shaped jaw articulation (which precludes fore-aft sliding of the lower jaw), and only three sacral vertebrae. The poorly-knownGalechirusandGalepusfrom the youngerCistecephalusAssemblage Zone appear to be at a comparably primitive evolutionary grade, and the three genera are tentatively united in the family Galechiridae. The taxon Dromasauria is shown to be paraphyletic and therefore should be discarded.

Url:
DOI: 10.1006/zjls.1996.0033


Affiliations:


Links toward previous steps (curation, corpus...)


Le document en format XML

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<title xml:lang="en">A primitive anomodont therapsid from the base of the Beaufort Group (Upper Permian) of South Africa</title>
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<name sortKey="Rubidge, Bruce S" sort="Rubidge, Bruce S" uniqKey="Rubidge B" first="Bruce S." last="Rubidge">Bruce S. Rubidge</name>
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<name sortKey="Hopson, James A" sort="Hopson, James A" uniqKey="Hopson J" first="James A." last="Hopson">James A. Hopson</name>
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<term>African museum</term>
<term>Anomodont</term>
<term>Anomodontia</term>
<term>Anomodonts</term>
<term>Anterior</term>
<term>Anterior border</term>
<term>Anterior ends</term>
<term>Anterior part</term>
<term>Anteriorly</term>
<term>Articular</term>
<term>Articular surface</term>
<term>Articulation</term>
<term>Beaufort</term>
<term>Beaufort group</term>
<term>Brinkman</term>
<term>Carpal</term>
<term>Centrale</term>
<term>Centrum</term>
<term>Cervical</term>
<term>Cervical centra</term>
<term>Cervical vertebrae</term>
<term>Condyle</term>
<term>Coronoid</term>
<term>Dentary</term>
<term>Dicynodont</term>
<term>Distal carpal</term>
<term>Distal carpals</term>
<term>Dorsal</term>
<term>Dorsal vertebrae</term>
<term>Dorsal view</term>
<term>Eodicynodon</term>
<term>External naris</term>
<term>Femur</term>
<term>Fenestra</term>
<term>Fenestra ovalis</term>
<term>Foramen</term>
<term>Galechirus</term>
<term>Galeops</term>
<term>Galeops whaitsi</term>
<term>Galepus</term>
<term>Geological society</term>
<term>Hopson</term>
<term>Hopson figure</term>
<term>Ilium</term>
<term>Jugal</term>
<term>Karoo</term>
<term>Last tooth</term>
<term>Lateral</term>
<term>Lateral centrale</term>
<term>Lateral margin</term>
<term>Lateral surface</term>
<term>Lateral view</term>
<term>Laterally</term>
<term>Linnean society</term>
<term>Mandibular fenestra</term>
<term>Maxilla</term>
<term>Medial</term>
<term>Medial border</term>
<term>Medial centrale</term>
<term>Medial condyle</term>
<term>Medial surface</term>
<term>Metacarpal</term>
<term>Musculature</term>
<term>Neural spines</term>
<term>Nmqr</term>
<term>Nodule</term>
<term>Nyaphulii</term>
<term>Occipital condyle</term>
<term>Other anomodonts</term>
<term>Palatine</term>
<term>Parietal</term>
<term>Patranomodon</term>
<term>Patranomodon nyaphulii</term>
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<term>Port elizabeth</term>
<term>Postcranial</term>
<term>Postcranial elements</term>
<term>Postcranial skeleton</term>
<term>Posterior half</term>
<term>Posterior part</term>
<term>Posteriorly</term>
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<term>Posttemporal foramen</term>
<term>Premaxilla</term>
<term>Primitive anomodont therapsid</term>
<term>Primitive anomodonts</term>
<term>Pterygoid</term>
<term>Quadrate</term>
<term>Quadrate ramus</term>
<term>Ramus</term>
<term>Rib</term>
<term>Right side</term>
<term>Rubidge</term>
<term>Rubidge hopson</term>
<term>Sacral</term>
<term>Sacral articulation</term>
<term>Sacral vertebrae</term>
<term>Short contact</term>
<term>Skull</term>
<term>Skull roof</term>
<term>Squamosal</term>
<term>Stapes</term>
<term>Tabular</term>
<term>Temporal fenestra</term>
<term>Therapsid</term>
<term>Therapsida</term>
<term>Upper Permian</term>
<term>Ventral</term>
<term>Ventral border</term>
<term>Ventral surfaces</term>
<term>Ventral view</term>
<term>Vertebra</term>
<term>Zoological society</term>
<term>Zygomatic arch</term>
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<term>African anomodont</term>
<term>African museum</term>
<term>Anomodont</term>
<term>Anomodonts</term>
<term>Anterior</term>
<term>Anterior border</term>
<term>Anterior ends</term>
<term>Anterior part</term>
<term>Anteriorly</term>
<term>Articular</term>
<term>Articular surface</term>
<term>Articulation</term>
<term>Beaufort</term>
<term>Beaufort group</term>
<term>Brinkman</term>
<term>Carpal</term>
<term>Centrale</term>
<term>Centrum</term>
<term>Cervical</term>
<term>Cervical centra</term>
<term>Cervical vertebrae</term>
<term>Condyle</term>
<term>Coronoid</term>
<term>Dentary</term>
<term>Dicynodont</term>
<term>Distal carpal</term>
<term>Distal carpals</term>
<term>Dorsal</term>
<term>Dorsal vertebrae</term>
<term>Dorsal view</term>
<term>Eodicynodon</term>
<term>External naris</term>
<term>Femur</term>
<term>Fenestra</term>
<term>Fenestra ovalis</term>
<term>Foramen</term>
<term>Galechirus</term>
<term>Galeops</term>
<term>Galeops whaitsi</term>
<term>Galepus</term>
<term>Geological society</term>
<term>Hopson</term>
<term>Hopson figure</term>
<term>Ilium</term>
<term>Jugal</term>
<term>Karoo</term>
<term>Last tooth</term>
<term>Lateral</term>
<term>Lateral centrale</term>
<term>Lateral margin</term>
<term>Lateral surface</term>
<term>Lateral view</term>
<term>Laterally</term>
<term>Linnean society</term>
<term>Mandibular fenestra</term>
<term>Maxilla</term>
<term>Medial</term>
<term>Medial border</term>
<term>Medial centrale</term>
<term>Medial condyle</term>
<term>Medial surface</term>
<term>Metacarpal</term>
<term>Musculature</term>
<term>Neural spines</term>
<term>Nmqr</term>
<term>Nodule</term>
<term>Nyaphulii</term>
<term>Occipital condyle</term>
<term>Other anomodonts</term>
<term>Palatine</term>
<term>Parietal</term>
<term>Patranomodon</term>
<term>Patranomodon nyaphulii</term>
<term>Permian</term>
<term>Port elizabeth</term>
<term>Postcranial</term>
<term>Postcranial elements</term>
<term>Postcranial skeleton</term>
<term>Posterior half</term>
<term>Posterior part</term>
<term>Posteriorly</term>
<term>Postfrontal</term>
<term>Postorbital</term>
<term>Posttemporal foramen</term>
<term>Premaxilla</term>
<term>Primitive anomodont therapsid</term>
<term>Primitive anomodonts</term>
<term>Pterygoid</term>
<term>Quadrate</term>
<term>Quadrate ramus</term>
<term>Ramus</term>
<term>Rib</term>
<term>Right side</term>
<term>Rubidge</term>
<term>Rubidge hopson</term>
<term>Sacral</term>
<term>Sacral articulation</term>
<term>Sacral vertebrae</term>
<term>Short contact</term>
<term>Skull</term>
<term>Skull roof</term>
<term>Squamosal</term>
<term>Stapes</term>
<term>Tabular</term>
<term>Temporal fenestra</term>
<term>Therapsid</term>
<term>Ventral</term>
<term>Ventral border</term>
<term>Ventral surfaces</term>
<term>Ventral view</term>
<term>Vertebra</term>
<term>Zoological society</term>
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<front>
<div type="abstract" xml:lang="en">Abstract: Patranomodon nyaphulii, known from a nearly complete skull, lower jaw and partial postcranial skeleton, is morphologically the most primitive anomodont therapsid yet discovered. It is from theEodicynodonAssemblage Zone, the lowest biozone of the Beaufort Group of South Africa, which has a primitive therapsid fauna comparable with that of the Russian Zone I.Patranaomodonis primitive with respect to other anomodonts in having short palatal exposure of the premaxilla, an unreduced tabular, a slit-like interpterygoidal vacuity, a screw-shaped jaw articulation (which precludes fore-aft sliding of the lower jaw), and only three sacral vertebrae. The poorly-knownGalechirusandGalepusfrom the youngerCistecephalusAssemblage Zone appear to be at a comparably primitive evolutionary grade, and the three genera are tentatively united in the family Galechiridae. The taxon Dromasauria is shown to be paraphyletic and therefore should be discarded.</div>
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<li>États-Unis</li>
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