Baurusuchus

Live reconstruction of Baurusuchus albertoi

  • South America ( Adamantina Formation, southern Brazil )
  • Baurusuchus pachecoi
  • Baurusuchus salgadoensis

Baurusuchus is a genus of Mesoeucrocodylia ( extinct crocodile relatives ) within the Baurusuchidae from the Upper Cretaceous of Brazil.

The genus name is derived from the southern Brazilian city of Bauru in Sao Paulo state and the Greek suchus ( Latinized ) or souchos (crocodile ), with the designated crocodile god Sobek the Egyptian to the Greek.

Fossil record

The fossil record of the genus in the sedimentary rocks of the Upper Cretaceous extends from the Turonian to Santonian, ie from 93.5 before to 83.5 million years ago. Fossils of the genus have been found exclusively in the Adamantina Formation in the Paraná Basin.

Description

The genus is assigned two ways:

  • Baurusuchus pachecoi Price, 1945
  • Baurusuchus salgadoensis Carvalho, Nobre & Campos, 2005

Fossil remains, which can not be clearly assigned to one type, are Baurusuchus sp. cited.

Baurusuchus pachecoi: The snout ( rostrum ) is elongated, concentrated high and to the side. The square legs show downward at right angles with simultaneous gentle slope to the rear. There is a single terminal nostril. Präorbitale the window does not exist. The eye sockets are oriented sideways. A lateral from the temporal bone laterotemporale window is separated from the orbit by a thin, unadorned, only slightly flattened postorbital bone. The square leg is fixed, the supratemporal window above the temporal bone are longer than wide and occupy almost the size of the eye socket. The nasal chambers extend forward to the single opening. The upper jaw is heavy and tall with a distinct notch ( symphysis ).

Baurusuchus salgadoensis: Characterized by an existing präorbitales window, paired external nares with an ossified septum, two well- intergrown with each other Supra orbitals, the supratemporal window larger than the eye opening and a square laterotemporales window. The positioning of the nasal openings at the anterior end of the rostrum with simultaneous theropodenartiger lateral constriction of the snout and teeth suggest that Baurusuchus salgadoensis was a carnivorous rural residents. The lateral narrowing of the rostrum may have resulted in an increase in bite force while protecting the skull area. With its tapered, conical, serrated at margins ( ziphodonten ) teeth pierced the animal its prey and tore out all the pieces. The geological setting suggests that Baurusuchus salgadoensis in a hot, arid climate has lived.

Swell

  • De Souza Carvalho, I., de Arruda Campos Celso, A., and Nobre, PH, 2005: Baurusuchus salgadoensis, a new Crocodylomorpha from the Bauru Basin ( Cretaceous ), Brazil: Gondwana Research, Volume 8, Number 1, pp. 11 -30.
  • De Vasconcellos, FM and de Souza Carvalho, I., 2007: Cranial features of Baurusuchus salgadoensis Carvalho, Campos & Nobre 2005, a Baurusuchidae ( Mesoeucrocodylia ) from the Adamantina Formation, Bauru Basin, Brazil: paleoichnological, taxonomic and systematic implications: In: Paleontologia: Cenarios de Vida, Volume 1, edited by Carvalho, I. de S., Cassab, R. de CT, Schwanke, C., Carvalho, M. de A. Fernandes, ACS, Rodrigues, MA since C. Carvalho, MSS de, Arai, M. and Oliveria, MEQ, pp. 319-332.
  • Nicholas C. Fraser and Hans -Dieter Sues: In the Shadow of the Dinosaurs: Early Mesozoic Tetrapods.
Mya (unit) Adamantina-Formation Archosaur Notosuchia Species Quadrate bone Desert climate Hans-Dieter Sues
109279
de