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Master's Dissertation
DOI
https://doi.org/10.11606/D.59.2018.tde-24032023-100056
Document
Author
Full name
Julian Cristian Gonçalves da Silva Júnior
E-mail
Institute/School/College
Knowledge Area
Date of Defense
Published
Ribeirão Preto, 2018
Supervisor
Committee
Langer, Max Cardoso (President)
Bronzati Filho, Mário
Montefeltro, Felipe Chinaglia
Santucci, Rodrigo Miloni
Title in English
Osteology and systematics of Uberabatitan ribeiroi (dinosauria; sauropoda): a late cretaceous titanosaur from Minas Gerais, Brazil
Keywords in English
Osteology
Sauropoda
Systematics
Titanosauria
Abstract in English
Uberabatitan ribeiroi is a Late Cretaceous titanosaur (Dinosauria, Sauropoda) from Brazil. Here we provide a detailed revision of all its available specimens, including new elements from the type-locality, helping to increase the anatomical knowledge of the taxon. Two new autapomorphies are proposed: (1) line through the distal condyles of the femur is perpendicular to the long axis of the shaft in anterior view and (2) astragalus with a well-developed anteroposteriorlly crest that delimits distally the tibial articulation. Further, linear regressions were conducted in an attempt do circumscribe specimens within the type-series, revealing that this is composed of several individuals, with sizes varying from 7 to 26 meters. Finally, phylogenetic analyses including U. ribeiroi show that the Brazilian taxon corresponds to a non-Saltasauridae titanosaur.
Title in Portuguese
Osteologia e sistemática de Uberabatitan ribeioi (dinosauria; sauropoda): um titanossauro do cretáceo tardio de Minas Gerais, Brasil
Keywords in Portuguese
Osteologia
Sauropoda
Sistemática
Titanosauria
Uberabatitan ribeiroi
Abstract in Portuguese
Uberabatitan ribeiroi é um titanossauro do Cretáceo tardio do Brasil. Uma revisão detalhada, incluindo novos elementos da localidade-tipo, ajudaram a incrementar a informação anatômica da espécie, incluindo a proposição de duas novas autopomorfias: (1) linha pelos côndilos distais do fêmur perpendicular ao maior eixo em vista anterior e (2) presença no astrágalo de uma crista pronunciada anteroposteriormente que delimita distalmente a articulação tibial. Para a devida separação dos espécimes, foi realizada uma regressão linear, mostrando que os três indivíduos propostos originalmente eram na verdade compostos de diversos indivíduos, com tamanhos variando de 7 a 26 metros. A análise filogenética em três diferentes matrizes mostrou que a espécie se posiciona como um titanossauro não-Saltasauridae.
 
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Publishing Date
2023-04-18
 
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