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Issue: Vol. 4577 No. 3: 8 Apr. 2019
Type: Article
Published: 2019-04-08
DOI: 10.11646/zootaxa.4577.3.1
Page range: 401–438
Abstract views: 207
PDF downloaded: 6

Osteology and systematics of Uberabatitan ribeiroi (Dinosauria; Sauropoda): a Late Cretaceous titanosaur from Minas Gerais, Brazil

Laboratorio de Paleontologia de Ribeirão Preto, Faculdade de Filosofia, Ciências e Letras de Ribeirão Preto, Universidade de São Paulo, Av. Bandeirantes, 3900, 14040-901, Ribeirao Preto, São Paulo, Brazil. Centro de Pesquisas Paleontológicas “Llewelyn Ivor Price”, Universidade Federal do Triângulo Mineiro, Peirópolis, Estanislau Collenghi 194, 38039-755, Peirópolis, Uberaba, Minas Gerais, Brazil.
Centro de Pesquisas Paleontológicas “Llewelyn Ivor Price”, Universidade Federal do Triângulo Mineiro, Peirópolis, Estanislau Collenghi 194, 38039-755, Peirópolis, Uberaba, Minas Gerais, Brazil. Instituto de Ciências Exatas, Naturais e Educaçao, Universidade Federal do Triângulo Mineiro, Departamento de Ciências Biológicas, Av. Doutor Randolfo Borges Júnior, 38064-200, Uberaba, Minas Gerais, Brazil.
CONICET-Sección Paleontología de Vertebrados, Museo Argentino de Ciencias Naturales 'Bernardino Rivadavia', Av. Ángel Gallardo 470, Buenos Aires, C1405DJR, Argentina.
Laboratorio de Paleontologia de Ribeirão Preto, Faculdade de Filosofia, Ciências e Letras de Ribeirão Preto, Universidade de São Paulo, Av. Bandeirantes, 3900, 14040-901, Ribeirao Preto, São Paulo, Brazil.
Chordata Titanosauriformes Titanosauria Phylogeny South America Bauru Basin

Abstract

Uberabatitan ribeiroi is a Late Cretaceous titanosaur (Dinosauria, Sauropoda) from southeastern Brazil. Here we provide a detailed revision of all its available specimens, including new elements from the type-locality. One new autopomorphy is added to diagnosis of the taxon: astragalus with a well-developed anteroposterior crest that mediodistally delimits the tibial articulation. Linear regressions were conducted in an attempt to circumscribe specimens within the type-series, revealing that it is composed of several individuals, with inferred total body lengths varying from 7 to 26 meters. Phylogenetic analyses including U. ribeiroi show that the Brazilian taxon corresponds to a non-saltasaurid lithostrotian titanosaur.

 

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