Campinasuchus

Campinasuchus is an extinct genus of baurusuchid mesoeucrocodylian from Minas Gerais State of Brazil.[1]

Campinasuchus
Temporal range: Late Cretaceous,
Holotype skull
Scientific classification Edit this classification
Domain: Eukaryota
Kingdom: Animalia
Phylum: Chordata
Class: Reptilia
Clade: Pseudosuchia
Clade: Crocodylomorpha
Suborder: Notosuchia
Clade: Sebecosuchia
Family: Baurusuchidae
Subfamily: Pissarrachampsinae
Genus: Campinasuchus
Carvalho et al., 2011
Type species
Campinasuchus dinizi
Carvalho et al., 2011

Discovery

Assigned snout

Campinasuchus is known from four partial skulls from the Honorópolis District of the Adamantina Formation, Bauru Basin, dating to the Turonian or the Santonian stage of the late Cretaceous, about 93.5-83.5 million years ago. The specimens were collected at Três Antas Farm, Campina Verde County of the Minas Gerais State. The holotype CPP 1235 consists of a well-preserved posterior skull and partial rostrum, and the paratypes, CPP 1234, partial skull, CPP 1236, nearly complete rostrum and CPP 1237, partial skull (including mandible) and associated postcranial skeleton.[2]

Campinasuchus was first named by Ismar De Souza Carvalho, Vicente De Paula Antunes Teixeira, Mara Lúcia Da Fonseca Ferraz, Luiz Carlos Borges Ribeiro, Agustín Guillermo Martinelli, Francisco Macedo Neto, Joseph J. W. Sertich, Gabriel Cardoso Cunha, Isabella Cardoso Cunha and Partícia Fonseca Ferraz in 2011 and the type species is Campinasuchus dinizi. The generic name is derived from Campina in reference to Campina Verde County in which Campinasuchus was found, and suchus, Latinized from the Greek souchos, an Egyptian crocodile god Sebek. The specific name honours the owners of the farm where the specimens were excavated: Izonel Queiroz Diniz Neto and the families Diniz and Martins Queiroz.[1]

Campinasuchus is the fifth baurusuchid species from the Adamantina Formation to date.

Description

Campinasuchus, like other baurusuchids, was a fully terrestrial predator. It had a deep and laterally compressed skull with large, blade-like teeth. Compared to other baurusuchids, it has a very short, low snout. It is much narrower than the back of the skull. Its upper margin is also lower than the back of the skull, giving the head a slightly sloping profile (other baurusuchids have high snouts that are level with the rest of the skull). The third maxillary tooth of the upper jaw and the fourth dentary tooth of the lower jaw are greatly enlarged. A small pit on the premaxilla accommodates the first tooth of the mandible when the jaws are closed. This pit is positioned between the first and second premaxillary teeth. A deep notch forms the boundary between the premaxilla and maxilla, and provides an opening for the large fourth dentary tooth of the lower jaw. The supratemporal fenestrae, holes at the back of the skull, are relatively small. In other baurusuchids, the fenestrae are almost as large as the eye sockets.[1]

Classification

The cladogram following by Nicholl et al. 2021:[3]

Notosuchia
Uruguaysuchidae

Araripesuchus tsangatsangana

Anatosuchus

Araripesuchus wegeneri

Araripesuchus buitreraensis

Araripesuchus gomesii

Araripesuchus patagonicus

Uruguaysuchus

Mahajangasuchidae

Kaprosuchus

Mahajangasuchus

Peirosauridae

Stolokrosuchus

Bayomesasuchus

Hamadasuchus

Antaeusuchus

Miadanasuchus

Barrosasuchus

Gasparinisuchus

Rukwasuchus

Uberabasuchus

Lomasuchus

Montealtosuchus

Candidodon

Ziphosuchia

Libycosuchus

Simosuchus

Neuquensuchus

Pakasuchus

Malawisuchus

Xenodontosuchia
Sphagesauria

Morrinhosuchus

Llanosuchus

Notosuchus

Labidiosuchus

Mariliasuchus

Sphagesauridae

Adamantinasuchus

Yacarerani

Caipirasuchus

Sphagesaurus

Caryonosuchus

Armadillosuchus

Chimaerasuchus

Comahuesuchus

Razanandrongobe

Sebecosuchia
Baurusuchidae

Cynodontosuchus

Pissarrachampsa

Campinasuchus

Stratiosuchus

Baurusuchus

Bergisuchus

Iberosuchus

Sebecidae

Ayllusuchus

Bretesuchus

Barinasuchus

Ogresuchus

Sebecus

References

  1. Ismar De Souza Carvalho; Vicente De Paula Antunes Teixeira; Mara Lúcia Da Fonseca Ferraz; Luiz Carlos Borges Ribeiro; Agustín Guillermo Martinelli; Francisco Macedo Neto; Joseph J. W. Sertich; Gabriel Cardoso Cunha; Isabella Cardoso Cunha & Partícia Fonseca Ferraz (2011). "Campinasuchus dinizi gen. et sp. nov., a new Late Cretaceous baurusuchid (Crocodyliformes) from the Bauru Basin, Brazil" (PDF). Zootaxa. 2871: 19–42. doi:10.11646/zootaxa.2871.1.2.
  2. Leonardo Cotts; André Eduardo Piacentini Pinheiro; Thiago da Silva Marinho; Ismar Carvalho & Fabio Di Dario (2017). "Postcranial skeleton of Campinasuchus dinizi (Crocodyliformes, Baurusuchidae) from the Upper Cretaceous of Brazil, with comments on the ontogeny and ecomorphology of the species". Cretaceous Research. 70: 163–188. doi:10.1016/j.cretres.2016.11.003.
  3. Nicholl CS, Hunt ES, Ouarhache D, Mannion PD (2021). "A second peirosaurid crocodyliform from the Mid-Cretaceous Kem Kem Group of Morocco and the diversity of Gondwanan notosuchians outside South America". Royal Society Open Science. 8 (10): Article ID 211254. doi:10.1098/rsos.211254. PMC 8511751. PMID 34659786.
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