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Titolo:
ANATOMY AND RELATIONSHIPS OF ELLIOTSMITHIA LONGICEPS BROOM, A SMALL SYNAPSID (EUPELYCOSAURIA, VARANOPSEIDAE) FROM THE LATE PERMIAN OF SOUTH-AFRICA
Autore:
REISZ RR; DILKES DW; BERMAN DS;
Indirizzi:
UNIV TORONTO,DEPT ZOOL,ERINDALE CAMPUS MISSISSAUGA ON L5L 1C6 CANADA UNIV WITWATERSRAND,BERNARD PRICE INST PALAEONTOL RES ZA-2050 WITWATERSRAND SOUTH AFRICA CARNEGIE MUSEUM NAT HIST,SECT VERTEBRATE PALEONTOL PITTSBURGH PA 15213
Titolo Testata:
Journal of vertebrate paleontology
fascicolo: 3, volume: 18, anno: 1998,
pagine: 602 - 611
SICI:
0272-4634(1998)18:3<602:AAROEL>2.0.ZU;2-C
Fonte:
ISI
Lingua:
ENG
Soggetto:
MAMMAL-LIKE REPTILE; THERAPSID FAUNAS; TEXAS; OSTEOLOGY; PHYLOGENY; GONDWANA; AMNIOTE; RECORD;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Science Citation Index Expanded
Citazioni:
55
Recensione:
Indirizzi per estratti:
Citazione:
R.R. Reisz et al., "ANATOMY AND RELATIONSHIPS OF ELLIOTSMITHIA LONGICEPS BROOM, A SMALL SYNAPSID (EUPELYCOSAURIA, VARANOPSEIDAE) FROM THE LATE PERMIAN OF SOUTH-AFRICA", Journal of vertebrate paleontology, 18(3), 1998, pp. 602-611

Abstract

Elliotsmithia longiceps Broom. 1937 is a varanopseid synapsid from the middle part of the Tapinocephalus Assemblage Zone (Late Permian) of the Abrahamskraal Formation (Beaufort Group), South Africa. Its placement within this basal eupelycosaur clade is supported by the presence of the following features: strongly recurved, mediolaterally flattenedmarginal dentition, a tall and posteroventrally enlarged temporal fenestra, a narrow lower temporal bar formed by the jugal and quadratojugal with only a small contribution from the maxilla, a long medial process of the parietal that extends far anteriorly over the orbital region, and distinctive ornamentation on three circumorbital bones. Analysis of varanopseid phylogenetic relationships indicates that Elliotsmithia is a sister taxon to the clade formed by the medium-sized North American varanopseids Varanops, Aerosaurus, and Varanodon. Elliotsmithia is unique among Paleozoic synapsids in showing evidence of supravertebral armor. Elliotsmithia is important biogeographically because it is the only known Permo-Carboniferous synapsid from the Southern Hemisphere in an assemblage dominated both numerically and taxonomically by therapsids. It demonstrates that Permo-Carboniferous synapsids were not excluded ecologically by therapsids and restricted to equatorial regions during the Late Permian.

ASDD Area Sistemi Dipartimentali e Documentali, Università di Bologna, Catalogo delle riviste ed altri periodici
Documento generato il 28/03/20 alle ore 14:11:21