Postcranial Anatomy of the Hyperodapedontine Rhynchosaur Teyumbaita sulcognathus (Azevedo and Schultz, 1987) from the Late Triassic of Southern Brazil (project)

10.7934/p1109 ◽  
2014 ◽  
Author(s):  
C Montefeltro ◽  
S Bittencourt ◽  
C Langer ◽  
L Schultz
Keyword(s):  
Late Triassic ◽  
Southern Brazil ◽  
Postcranial Anatomy

Postcranial anatomy of the hyperodapedontine rhynchosaurTeyumbaita sulcognathus(Azevedo and Schultz, 1987) from the Late Triassic of Southern Brazil

2013 ◽  
Vol 33 (1) ◽  
pp. 67-84 ◽  
Author(s):  
Felipe Chinaglia Montefeltro ◽  
Jonathas Souza Bittencourt ◽  
Max Cardoso Langer ◽  
Cesar Leandro Schultz
Keyword(s):  
Late Triassic ◽  
Southern Brazil ◽  
Postcranial Anatomy

The nasal cavity of two traversodontid cynodonts (Eucynodontia, Gomphodontia) from the Upper Triassic of Brazil

2021 ◽  
pp. 1-16
Author(s):  
Arymathéia Santos Franco ◽  
Rodrigo Temp Müller ◽  
Agustín G. Martinelli ◽  
Carolina A. Hoffmann ◽  
Leonardo Kerber
Keyword(s):  
Nasal Cavity ◽  
Fossil Record ◽  
Nasal Septum ◽  
Internal Surface ◽  
Nasolacrimal Duct ◽  
Upper Triassic ◽  
Late Triassic ◽  
Southern Brazil ◽  
Dorsal Region ◽  
Left And Right

Abstract Traversodontidae is a group of Triassic herbivorous/omnivorous cynodonts that represents the most diversified lineage within Cynognathia. In southern Brazil, a rich fossil record of late Middle/mid-Late Triassic cynodonts has been documented, with Exaeretodon riograndensis Abdala, Barberena, and Dornelles, 2002 and Siriusgnathus niemeyerorum Pavanatto et al., 2018 representing two abundant and well-documented traversodontids. The present study provides a comparative analysis of the morphology of the nasal cavity, nasal recesses, nasolacrimal duct, and maxillary canals of both species using computed tomography, highlighting the changes that occurred in parallel to the origin of mammaliaforms. Our results show that there were no ossified turbinals or a cribriform plate delimiting the posterior end of the nasal cavity, suggesting these structures were probably cartilaginous as in nonmammaliaform cynodonts. Both species show lateral ridges on the internal surface of the roof of the nasal cavity, but the median ridge for the attachment of a nasal septum is absent. Exaeretodon riograndensis and S. niemeyerorum show recesses on the dorsal region of the nasal cavity, which increase the volume of the nasal cavity, potentially enhancing the olfactory chamber and contributing to the sense of smell. On the lateral sides of the nasal cavity, the analyzed taxa show a well-developed maxillary recess. Although E. riograndensis and S. niemeyerorum have roughly similar nasal cavities, in the former taxon, the space between the left and right dorsal recesses of the nasal cavity is uniform along its entire extension, whereas this space narrows posteriorly in S. niemeyerorum. Finally, the nasolacrimal duct of S. niemeyerorum is more inclined anteroposteriorly than in E. riograndensis.

A new record of Lestodon armatus Gervais 1855 (Xenarthra, Mylodontidae) from the Quaternary of southern Brazil and remarks on its postcranial anatomy

2019 ◽  
pp. 1-17
Author(s):  
Dilson Vargas-Peixoto ◽  
Cícero Schneider Colusso ◽  
Átila Augusto Stock Da-Rosa ◽  
Leonardo Kerber
Keyword(s):  
New Record ◽  
Southern Brazil ◽  
Postcranial Anatomy

New rhynchocephalian specimen in the Late Triassic of southern Brazil and comments on the palatine bone of Brazilian rhynchocephalians

2019 ◽  
pp. 1-9 ◽  
Author(s):  
Paulo R. Romo-de-Vivar-Martínez ◽  
Agustín G. Martinelli ◽  
Voltaire D. Paes Neto ◽  
Camila A. Scartezini ◽  
Marcel B. Lacerda ◽  
...  
Keyword(s):  
Late Triassic ◽  
Southern Brazil ◽  
Palatine Bone

A New Rhynchocephalian from the Late Triassic of Southern Brazil Enhances Eusphenodontian Diversity

2020 ◽  
Vol 18 (13) ◽  
pp. 1103-1126 ◽  
Author(s):  
Paulo R. Romo de Vivar ◽  
Agustín G. Martinelli ◽  
Annie Schmaltz Hsiou ◽  
Marina Bento Soares
Keyword(s):  
Late Triassic ◽  
Southern Brazil

scholarly journals Anatomy of the dinosaur Pampadromaeus barberenai (Saurischia—Sauropodomorpha) from the Late Triassic Santa Maria Formation of southern Brazil

PLoS ONE ◽  
2019 ◽  
Vol 14 (2) ◽  
pp. e0212543 ◽  
Author(s):  
Max Cardoso Langer ◽  
Blair Wayne McPhee ◽  
Júlio César de Almeida Marsola ◽  
Lúcio Roberto-da-Silva ◽  
Sérgio Furtado Cabreira
Keyword(s):  
Late Triassic ◽  
Southern Brazil ◽  
Santa Maria

Biogenic control on the origin of a vertebrate monotypic accumulation from the Late Triassic of southern Brazil

Geobios ◽  
2015 ◽  
Vol 48 (4) ◽  
pp. 331-340 ◽  
Author(s):  
Rodrigo Temp Müller ◽  
Hermínio Ismael de Araújo-Júnior ◽  
Alex Sandro Schiller Aires ◽  
Lúcio Roberto-da-Silva ◽  
Sérgio Dias-da-Silva
Keyword(s):  
Late Triassic ◽  
Southern Brazil
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