The oldest Brazilian snakes from the Cenomanian (early Late Cretaceous)

• Autorzy: Hsiou A.S. , Albino A. M. , Medeiros M. A. , Santos R. A. B.
• Języki publikacji: EN

Abstrakty

EN

South American Mesozoic snake diversity is mostly represented by genera from the Cenomanian (Najash), Santonian– Campanian (Dinilysia), and Campanian–Maastrichtian (Alamitophis, Patagoniophis, Rionegrophis, and Australophis) of Patagonia, Argentina. In this paper, we describe a new snake genus and species, Seismophis septentrionalis, from the Cenomanian (early Late Cretaceous) of the Alcântara Formation, Maranhão, northeastern Brazil. The new snake comprises a posteriormost trunk vertebra and possibly a poorly preserved midtrunk vertebra. Both vertebrae share small size, zygosphene moderately thick with a rectilinear roof, absence of paracotylar foramina, presence of parazygantral foramina, and strongly marked parasagittal ridges of the neural arch. The new snake is here considered of uncertain systematic affinities, but probably close to the limbed snake Najash rionegrina. Although the material is very fragmentary and the systematic assignment is still unresolved, this snake represents the oldest, as well as probably the most primitive snake from Brazil.

Słowa kluczowe

EN

paleontology; Reptilia; Squamata; Ophidia; snake; Cenomanian; Late Cretaceous; Cretaceous; Brazil

• Wydawca: -
• Czasopismo: Acta Palaeontologica Polonica
• Rocznik: 2014
• Tom: 59
• Numer: 3
• Opis fizyczny: p.635-642,fig.,ref.

Twórcy

autor

Hsiou A.S.

• Departamento de Biologia, FFCLRP, Universidade de Sao Paulo, Av. Bandeirantes 3900, 14040-901, Ribeirao Preto, SP, Brasil

autor

Albino A. M.

• CONICET, Departamento de Biologiia, Universidad Nacional de Mar del Plata, Funes 3250, 7600 Mar del Plata, Argentina

autor

Medeiros M. A.

• Departamento de Biologia, Centro de Ciencias Biologicas e da Saude, Universidade Federal do Maranhao (UFMA), Avenida dos Portugueses, 1966, Campus Universitario do Bacanga, CEP 65085-580, Sao Luis, MA, Brasil

autor

Santos R. A. B.

• Departamento de Biologia, Centro de Ciencias Biologicas e da Saude, Universidade Federal do Maranhao (UFMA), Avenida dos Portugueses, 1966, Campus Universitario do Bacanga, CEP 65085-580, Sao Luis, MA, Brasil

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Identyfikatory

DOI

2012.0091