A new basal sphenacodontid synapsid from the Late Carboniferous of the Saar-Nahe Basin, Germany

• Autorzy: Frobisch J. , Schoch R.R. , Muller J. , Schindler T. , Schweiss D.
• Języki publikacji: EN

Abstrakty

EN

A new basal sphenacodontid synapsid, represented by an anterior portion of a mandible, demonstrates for the first time the presence of amniotes in the largest European Permo−Carboniferous basin, the Saar−Nahe Basin. The new taxon, Cryptovenator hirschbergeri gen. et sp. nov., is autapomorphic in the extreme shortness and robustness of the lower jaw, with moderate heterodonty, including the absence of a greatly reduced first tooth and only a slight caniniform development of the second and third teeth. Cryptovenatorshares with Dimetrodon, Sphenacodon, and Ctenospondylus, but notably not with Secodontosaurus, enlarged canines and a characteristic teardrop outline of the marginal teeth in lateral view, possession of a deep symphyseal region, and a strongly concave dorsal margin of the dentary. The new find shows that sphenacodontids were present in the Saar−Nahe Basin by the latest Carboniferous, predating the record of sphenacodontid tracks from slightly younger sediments in this region.

Słowa kluczowe

EN

Carboniferous; Cryptovenator hirschbergeri; Germany; Late Carboniferous; phylogenetic relationship; Saar−Nahe Basin; Sphenacodontidae; Synapsida; geological setting; new species; paleontology; sediment; sphenacodontid synapsid; systematics; taxonomy

• Wydawca: -
• Czasopismo: Acta Palaeontologica Polonica
• Rocznik: 2011
• Tom: 56
• Numer: 1
• Opis fizyczny: p.113-120,fig.,ref.

Twórcy

autor

Frobisch J.

• Department of Geology, The Field Museum, 1400 South Lake Shore Drive, Chicago, Illinois 60605, USA

autor

Schoch R.R.

autor

Muller J.

autor

Schindler T.

autor

Schweiss D.

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