Baurusuchus

Baurusuchus
	Live reconstruction of Baurusuchus albertoi
Temporal occurrence
	Turonium to Santonium
	93.9 to 83.6 million years
Locations
	South America ( Adamantina Formation , South Brazil);
Systematics
	Archosauria
	Crocodylomorpha
	Mesoeucrocodylia
	Notosuchia
	Baurusuchidae
	Baurusuchus
Scientific name
	Baurusuchus
	Price , 1945
Art
	Baurusuchus pachecoi; Baurusuchus salgadoensis;

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

The generic name is derived from the southern Brazilian city of Bauru in the state of São Paulo and the Greek suchus ( Latinized ) or souchos ( crocodile ), with which the Greeks referred to the Egyptian crocodile god Sobek .

Fossil record

The fossil record of the genus in the sedimentary rocks of the Upper Cretaceous extends from the Turonian to the Santonian , i.e. from 93.5 to 83.5 million years ago. Fossils of the genus have so far only been found in the Adamantina Formation in the Paraná Basin .

description

Three species are assigned to the genus:

† Baurusuchus pachecoi Price , 1945
† Baurusuchus salgadoensis Carvalho , Campos & Nobre , 2005
† Baurusuchus albertoi Nascimento & Zaher , 2010

Fossil remains that cannot be clearly assigned to a species are listed under Baurusuchus sp. cited.

Baurusuchus pachecoi : The snout (rostrum) is elongated, high and narrowed to the side. The square legs point downwards at right angles with a simultaneous slight incline backwards. There is a single terminal nostril. The pre-orbital window is absent. The eye sockets are oriented sideways. The laterotemporal window attached to the side of the temporal bone is separated from the eye socket by a thin, undecorated, only insignificantly flattened postorbital bone. The square leg is fixed, the supratemporal windows above the temporal bone are longer than they are wide and are almost the size of the eye socket. The nasal chambers extend forward to the single opening. The upper jaw is heavy and high with a distinct notch ( symphysis ).

Baurusuchus salgadoensis : Characterized by an existing pre-orbital window, paired external nostrils with an ossified septum, two well-fused supraorbital areas, the supratemporal window larger than the eye opening, and a square laterotemporal window. The positioning of the nostrils at the front end of the rostrum with simultaneous theropod-like lateral narrowing of the snout and teeth suggest that Baurusuchus salgadoensis was a carnivorous rural dweller. The lateral narrowing of the rostrum possibly led to an increase in the biting force with simultaneous protection of the skull area. With its pointed, conical, serrated (ziphodont) teeth, the animal pierced its prey and tore out whole pieces. The geological framework suggests that Baurusuchus salgadoensis lived in a hot, arid climate .

literature

Nicholas C. Fraser, Hans-Dieter Sues (Ed.): In the Shadow of the Dinosaurs. Early Mesozoic Tetrapods. Cambridge University Press, Cambridge et al. 1994, ISBN 0-521-45242-2 .
Felipe Mesquita de Vasconcellos, Ismar de Souza Carvalho: 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: Ismar de Souza Carvalho, Rita de Cassia Tardin Cassab, Cibele Schwanke, Marcelo de Araujo Carvalho, Antonio Carlos Sequeira Fernandes, Maria Antonieta de Conceição Rodrigues, Marise Sardenberg Salgado de Carvalho, Mitsuru Arai, Maria Emília Queiroz Oliveria (eds.): Paleontologia. Cenarios de vida. Volume 1. Editora Interciência, Rio de Janeiro 2007, ISBN 978-85-7193-184-8 , pp. 319-332, online (PDF; 1.3 MB) .
Alfred Sherwood Romer : The Osteology of the Reptiles. University of Chicago Press, Chicago IL 1956 (Reprinted edition. Krieger, Malabar FL 1997, ISBN 978-0894649851 ).
Ismar de Souza Carvalho, Antonio de Celso Arruda Campos, Pedro Henrique Nobre: Baurusuchus salgadoensis, a New Crocodylomorpha from the Bauru Basin (Cretaceous), Brazil. In: Gondwana Research. Vol. 8, No. 1, 2005, ISSN 1342-937X , pp. 11-30, doi : 10.1016 / S1342-937X (05) 70259-8 .

Web links

Commons : Baurusuchus - collection of images, videos and audio files

Individual evidence

^ Llewellyn I. Price: A new reptile from the Cretaceous of Brazil. In: Notas preliminares e estudos. Boletim 25, 1945, ZDB -ID 435759-0 , pp. 1-8.
↑ Ismar de Souza Carvalho, Antonio de Celso Arruda Campos, Pedro Henrique Nobre: Baurusuchus salgadoensis, a new Crocodylomorpha from the Bauru Basin (Cretaceous), Brazil. In: Gondwana Research . Vol. 8, No. 1, 2005, ISSN 1342-937X , pp. 11-30, doi : 10.1016 / S1342-937X (05) 70259-8 .
↑ Paulo Miranda Nascimento, Hussam Zaher: A new species of Baurusuchus (Crocodyliformes, Mesoeucrocodylia) from the Upper Cretaceous of Brazil, with the first complete postcranial skeleton described from the family Baurusuchidae. In: Papéis Avulsos de Zoologia. Vol. 50, No. 21, 2010, ISSN 0031-1049 , pp. 323-361, digitized version (PDF; 10.28 MB) .

[price-1] Llewellyn I. Price: A new reptile from the Cretaceous of Brazil. In: Notas preliminares e estudos. Boletim 25, 1945, ZDB -ID 435759-0 , pp. 1-8.

[salgadoensis-2] Ismar de Souza Carvalho, Antonio de Celso Arruda Campos, Pedro Henrique Nobre: Baurusuchus salgadoensis, a new Crocodylomorpha from the Bauru Basin (Cretaceous), Brazil. In: Gondwana Research . Vol. 8, No. 1, 2005, ISSN 1342-937X , pp. 11-30, doi : 10.1016 / S1342-937X (05) 70259-8 .

[Nascimento10-3] Paulo Miranda Nascimento, Hussam Zaher: A new species of Baurusuchus (Crocodyliformes, Mesoeucrocodylia) from the Upper Cretaceous of Brazil, with the first complete postcranial skeleton described from the family Baurusuchidae. In: Papéis Avulsos de Zoologia. Vol. 50, No. 21, 2010, ISSN 0031-1049 , pp. 323-361, digitized version (PDF; 10.28 MB) .