Published
First record of Crocodyliformes Osteoderm from the Upper Cretaceous Bauru Group, State of Goiás , Brazil.
Primer registro de un osteodermo Crocodyliformes del Cretácico Superior del Grupo Bauru, estado de Goiás
DOI:
https://doi.org/10.15446/esrj.v29n2.118095Keywords:
Osteoderm, Mesoeucrocodylia, Late Cretaceous, Central Brazil, Bauru Group (en)Osteodermo, Mesoeucrocodylia, Cretácico tardío, Grupo Bauru, Brasil central (es)
Downloads
The Crocodyliformes from the Late Cretaceous of South America were one of the main components of the tetrapod faunas found in rocks of the Bauru Group at Goiás, Minas Gerais and São Paulo states, Brazil. The presence of osteoderms has been reported in articulated specimens or found isolated in the palaeontological record. In the present work, we describe the first osteoderm of Mesoeucrocodylia from the Campanian-Maastrichtian of the Marília Formation (Bauru Group) of the state of Goiás. Paleo-UFG-114 has a quadrilateral shape, a rough external texture with radially oriented corrosion, an internal facet with the presence of intersecting grooves, foramina in the internal and external region and the presence of a poorly developed keel. These features differentiate them from the osteoderms of titanosaur dinosaurs found in the rocks of this geological unit. The presence of Paleo-UFG-114 in the state of Goiás reaffirms that mesoeucrocodylians were important components of the reptile fauna, and contributes to increasing knowledge about the group’s geographic distribution in this poorly-explored region of Central Brazil
Los Crocodyliformes del Cretácico Tardío de América del Sur fueron uno de los componentes principales de las faunas de tetrápodos halladas en rocas del Grupo Bauru en los estados de Goiás, Minas Gerais y São Paulo, Brasil. La presencia de osteodermos ha sido reportada en especímenes articulados o encontrados aislados en el registro paleontológico. En el presente trabajo describimos el primer osteodermo de Mesoeucrocodylia del Campaniano-Maastrichtiano de la Formación Marília (Grupo Bauru) del estado de Goiás. El espécimen Paleo-UFG-114 tiene una forma cuadrilátera, una textura externa rugosa con corrosión orientada radialmente, una faceta interna con presencia de surcos intersectados, forámenes en las regiones interna y externa y una quilla poco desarrollada. Estas características los diferencian de los osteodermos de dinosaurios titanosaurios encontrados en las rocas de esta unidad geológica. La presencia de Paleo-UFG-114 en el estado de Goiás reafirma que los mesoeucrocodilianos fueron componentes importantes de la fauna de reptiles y contribuye a aumentar el conocimiento sobre la distribución geográfica del grupo en esta región poco explorada del centro de Brasil.
References
Basilici, G. & Dal’ Bo, P. F. F. 2010. Anatomy and controlling factors of a Late Cretaceous aeolian sand sheet depositional system - the Marília and the Adamantina formations, NW of the Bauru Basin, Brazil. Sedimentary Geology, 226:71-93. DOI: https://doi.org/10.1016/j.sedgeo.2010.02.010
Batezelli, A.; Ladeira, F.S.B.; Nascimento, D.L. & Silva, M.L. 2019. Facies and palaeosol analysis in a progradational distributive fluvial system from the Campanian –Maastrichtian Bauru Group, Brazil. Sedimentology 66(2):699-735. https://doi.org/10.1111/sed.12507. DOI: https://doi.org/10.1111/sed.12507
Brandt Neto, M., Barcha, S.F., Manzini, F.F. and Brighetti, J.M.P. (1991) Nova ocorrência de crocodilianos na região noroeste do Estado de São Paulo. Geociências, UNESP, v. 10, pp. 191-203.
Brandt Neto, M., Manzini, F.F. and Bertini, R.J. (1992) Sobre um membro locomotor dianteiro de Baurusuchidae (Crocodylia), da região de General Salgado (SP). Resumos Expandidos do 2° Simpósio sobre as Bacias Cretácicas Brasileiras, Rio Claro, 1992, UNESP - Campus de Rio Claro/SP, pp. 163-164.
Buffetaut, E. (1980) Histoire biogéographique des Sebecosuchia(Crocodylia, Mesosuchia): un essai dinterprétation. Annales de Paléontologie (Vertébrés), v. 66, pp. 1-18.
Candeiro, C. R. A., Martinelli, A. G., Avilla, L. S. & Rich, T. 2006. Tetrapods from the Upper Cretaceous (Turonian-Maastrichtian) Bauru Group of Brazil - a reappraisal. Cretaceous Research, 27, 923-946. DOI: https://doi.org/10.1016/j.cretres.2006.05.002
Candeiro, C. R. A. & Figueirôa, S.F.M. 2017. Early twentieth-century paleontological research of Freidrich von Huene - contributions to the knowledge of Late Cretaceous vertebrates of Central Brazil. Historical Biology, 29, 1-10. DOI: https://doi.org/10.1080/08912963.2017.1335311
Candeiro, C. R. A. et al., 2018. New reports of Late Cretaceous reptiles from the Bauru Group of southern Goiás State, Brazil. JOURNAL OF SOUTH AMERICAN EARTH SCIENCES, v. 85, p. 229-235, 2018. DOI: https://doi.org/10.1016/j.jsames.2018.04.019
Candeiro, C. R. A.; Brusatte, S. L. & Simbras, F. M. 2018. Occurrence of tetrapod fossils in Goiás state: A rediscovery in Central Brazil. In: Figueiredo, A. E. Q., Oliveira, P. V. (Eds). Proceedings of the XI Simpósio Brasileiro de Paleontologia de Vertebrados; Jul 16-20; Teresina (PI): Boletim de Resumos.
Candeiro, C. R. A.; Brusatte, S. L.; Simbras, F. M.; Costa, R. G. F.; Ulian, M.; Ferreira, B. M.; Lima, C. V.; Pereira, P. V. & Morais, E. M. 2020. First record of a theropod (Dinosauria, Theropoda) from the Late Cretaceous of the Bauru Group, southern Goiás state, Brazil. Research, Society and Development, 9, e563985261. DOI: https://doi.org/10.33448/rsd-v9i8.5261
Candeiro, C. R. A.; Lima, C. V.; Canile, F. M.; Brusatte, S. L.; Dias, T. C.; Ferreira, B. M.; Lopes, R. F. & Rodrigues, J. E. C. 2022. Late Paleozoic, Late Cretaceous and Pleitocene-Holocene reptiles and mamals fauna: a review from Goiás State, Brazil. BOLETÍN GEOLÓGICO Y MINERO 133 (4):37-53. DOI: https://doi.org/10.21701/bolgeomin/133.4/002
Candeiro, C. R. A.; Ribeiro, T.; Paula, T. A.; Pereira, P. V. G. C.; Vidal, L.; Gil, L. M.; Dias, T.; Gonzalez-Riga, B.; Brusatte, S. L. & Carabajal, A. P. 2024. The northernmost record of Abelisauridae (Theropoda: Ceratosauria) from the Upper Cretaceous Bauru Basin, Brasil. Journal of South American Earth Sciences submitted. DOI: https://doi.org/10.2139/ssrn.4893768
Carvalho, I.S. and Bertini, R.J. (1998) Paleoenvironments of the Brazilian Cretaceous notosuchians. Prog. and Abst. Crocodilian Biology and Evolution Conference, Australia, 1998, Department of Zoology, The University of Queensland, p. 19.
Carvalho, I.S. and Bertini, R.J. (1999) Mariliasuchus, um novo Crocodylomorpha (Notosuchia) do Cretáceo da Bacia Bauru, Brasil. Revista Geol. Colombiana, v. 24, pp. 83-105.
Carvalho, I.S. and Bertini, R.J. (2000) Contexto geológico dos notossúquios (Crocodylomorpha) cretácicos do Brasil. Revista Geol. Colombiana, v. 25, pp. 163-184.
Carvalho, I.S.; Ribeiro, L.C.B. & Avilla, L.S. 2004. Uberabasuchus terrificus sp. nov. a new crocodylomorpha from the Bauru Basin (Upper Cretaceous), Brazil. Gondwana Research, 7(4):975-1002. DOI: https://doi.org/10.1016/S1342-937X(05)71079-0
Carvalho, I. S.; Vasconcellos, F. M. & Tavares, S. A. S., 2007. Montealtosuchus arrudacamposi, a new peirosaurid crocodile (Mesoeucrocodylia) from the Late Cretaceous Adamantina Formation of Brazil. Zootaxa 1607, 35e46. DOI: https://doi.org/10.11646/zootaxa.1607.1.3
D’emic, M. D.; Wilson J. A. & Chatterjee S. 2009. The Titanosaur (Dinosauria: Sauropoda) osteoderm record: Review and First Definitive Specimen from Índia. Journal of Vertebrate Palenontology 29(1):165-177, Mach 2009. DOI: https://doi.org/10.1671/039.029.0131
Fernandes, L. A &Coimbra, A. M. 1996. A Bacia Bauru (Cretáceo Superior, Brasil). Anais da Academia Brasileira de Ciências, Rio de Janeiro, v. 8, n. 2, p. 195205.
Frey, E. 1988. Das Tragsystem der Krokodileeine biomechanische und phylogenetische Analyse. Stuttgarter Beitr ¨age zur Naturkunde A 426:1–60.
Hill, R. V. Hill. 2010. Osteoderms of Simosuchus clarki (Crocodyliformes: Notosuchia) from the Late Cretaceous of Madagascar, Journal of Vertebrate Paleontology, 30:sup1, 154-176, DOI: 10.1080/02724634.2010.518110 DOI: https://doi.org/10.1080/02724634.2010.518110
Huene, F. 1931. Verschiedene mesozoische Wirbeltierreste aus Südamerika. Neues Jahrbuch für Mineralogie, Geologie und Paläontologie, Abteilung A, 66, 181-198.
Huene, F. 1933. Ein Versuchzur Stammesgeschichte der Krokodile. Central blatt für Mineralogie, Geologie und Paläontologie, Abteilung B, 11, 577-585.
Ihering, F. 1911. Fósseis de São José do Rio Preto. Revista do Museu Paulista, 8, 141-146.
Lindoso, R. M.; Marinho, T. S.; Santucci, R. M.; Medeiros, M. A. & Carvalho, I. S. 2013. A Titanosaur (Dinosauria: Sauropoda) osteoderm from the Alcântara Formation (Cenomanian), São Luís Basin, Northeastern Brazil. Cretaceous Research 45:43 - 48. DOI: https://doi.org/10.1016/j.cretres.2013.07.005
Marinho, T. S., Ribeiro, L. C. B. & Carvalho, I, S. 2006. Morfologia de Osteodermos de Crocodilomorfos do Sítio Paleontológico de Peirópolis (Bacia Bauru, Cretáceo Superior). Anuário do Instituto de Geociência - UFRJ. Vol. 29 -2 /2006. p. 44-53 DOI: https://doi.org/10.11137/2006_2_44-53
Martinelli, A. G. & Teixeira, V. P. A. 2015. The Late Cretaceous vertebrate record from the Bauru Group at the Triângulo Mineiro, southeastern Brazil. Boletin Geologico y minero, 62, 129-158.
Mezzalira, S. 1974. Contribuição ao conhecimento da estratigrafia e paleontologia do arenito Bauru. Boletim do Instituto Geográfico e Geológico, 51:1-163.
Mook, C.C. 1921. Notes on the postcranial skeleton in the Crocodilia. Bulletin of the American Museum of Natural History, 44: 67-100.
Pacheco, J. A. 1913. Notas sobre a geologia do vale do Rio Grande a partir da foz do Rio Pardo até sua confluência com o Rio Paranaíba. Comissão Geográfica Geológica, 1, 33-38.
Price, L.I. (1945) A new reptile from the Cretaceous of Brazil. Notas preliminares e estudos. Departamento Nacional da Produção Mineral, v. 25, 8p.
Price, L.I. 1955. Novos crocodilídeos dos arenitos da Série Bauru. Cretáceo do Estado de Minas Gerais. Anais da Academia Brasileira de Ciências. 27: 487-498.
Ross, F. D. & G. C. Mayer. 1983. On the dorsal armor of the Crocodilia; pp. 305–331 in A. G. J. Rhodin and K. Miyata (eds.), Advances in Herpetology and Evolutionary Biology (Essays in Honor of Ernest E. Williams). Museum of Comparative Zoology, Cambridge, Massachusetts.
Salisbury, S. & E. Frey. 2001. A biomechanical transformation model for the evolution of semi-spheroidal articulations between adjoining vertebral bodies in crocodilians; pp. 85–134 in G. C. Grigg, F. Seebacher, and C. E. Franklin (eds.), Crocodilian Biology and Evolution. Surrey Beatty and Sons, Chipping Norton, New SouthWales.
Santos-Pereira, C.; Figueiredo-Lima, C. & Candeiro, C. R. A. 2016. Resultados preliminares del análisis de sedimentos del Grupo Bauru del sur de la Provincia de Goiás en la búsqueda de microvertebrados. In: Novas, F. E. (Ed). Proceedings of the XXX Jornadas Argentinas de Paleontología de Vertebrados Libro de resúmenes; May 17-20; Buenos Aires. p. 111.
Soares, P. C.; Landim, P. M. B.; Fulfaro, V. J. & Sobreiro Neto, A. F. 1980. Ensaio de caracterização do Cretáceo no Estado de São Paulo, Revista Brasileira de Geociências, 10:177-185. DOI: https://doi.org/10.25249/0375-7536.1980177185
Soares, M. V. T.; Basilici, G.; Marinho, T. S.; Martinelli, A. G.; Marconato, A.; Mountney, N. P.; Colombera, L.; Mesquita, Á. F.; Vasques, J. T.; JUNIOR, Abrantes, F. R. & Ribeiro, L. C. B. 2020. Sedimentology of a distributive fluvial system: The Serra da Galga Formation, a new lithostratigraphic unit (Upper Cretaceous, Bauru Basin, Brazil). GEOLOGICAL JOURNAL, v. x, p. 105807, 2020. DOI: https://doi.org/10.1002/gj.3987
Tavares, S. A. S.; Ricardi-Branco, F & Carvalho, I. S. 2015. Osteoderms of Montealtosuchus arudacamposi (Crocodyliformes, Peirosauridae) from the Turonian-Santonian (Upper Cretaceous) of Bauru Basin, Brazil. Cretaceous Research 56: 651-661. DOI: https://doi.org/10.1016/j.cretres.2015.07.002
Torres, S. R.; Avilla, L. S.; Abrantes, E. A. L. & Bergqvist, L. P. 2001. Dinosaur osteoderms from the Adamatina Formation, Upper Cretaceous of São Paulo state, Brazil. Anais da Academia Brasileira de Ciências (2002) 74(2):361-370 DOI: https://doi.org/10.1590/S0001-37652002000200021
How to Cite
APA
ACM
ACS
ABNT
Chicago
Harvard
IEEE
MLA
Turabian
Vancouver
Download Citation
License
Copyright (c) 2025 Earth Sciences Research Journal

This work is licensed under a Creative Commons Attribution 4.0 International License.
Earth Sciences Research Journal holds a Creative Commons Attribution license.
You are free to:
Share — copy and redistribute the material in any medium or format
Adapt — remix, transform, and build upon the material for any purpose, even commercially.
The licensor cannot revoke these freedoms as long as you follow the license terms.
The Earth Sciences Research Journal is the copyright holder for these license attributes.











