Analise cladística - filogenética e paleobiogeográfica dos Mesoeucrocodylia (Crocodylomorpha; Crocodyliformes) do Grupo Bauru (Cretáceo Superior) do Sudeste do Brasil

• Ano de defesa: 2015
• Autor(a) principal: Geroto, Caio Fabricio Cezar [UNESP]
• Tipo de documento: Tese
• Tipo de acesso: Acesso aberto
• Idioma: por
• Instituição de defesa: Universidade Estadual Paulista (Unesp)
• Palavras-chave em Português: Phylogeny; Analise cladistica; Paleobiologia; Filogenia; Brasil, Sudeste
• Link de acesso: http://hdl.handle.net/11449/132795; http://www.athena.biblioteca.unesp.br/exlibris/bd/cathedra/21-12-2015/000855644.pdf

Crocodylomorphs are the most expressive group of vertebrate fossils from the Bauru Group, counting 25 formally described species, distributed among four main groups: Notosuchia, Baurusuchidae, Peirosauridae, Trematochampsidae. Facing the new morphotypes described it is necessary a phylogenetic analysis to test possible relationships with established taxa. Besides, none work brings a methodology regarding a biogeographic approach to these goups, thus the objectives of this study were to perform a phylogenetic analysis and use the results to a Brooks Parsimony analysis. The result of the analysis took to 3 trees of 2259 steps each, generating a consensus tree of 2270 steps. Mesoeucrocodylia was recovered, consisting of two more inclusive clades: Neosuchia and Gondwanasuchia. The latter is composed by Sebecia and Notosuchia, Sebecia includes a monophyletic group composed by Trematochampsidae, Peirosauridae, and Itasuchidae, a clade comprising Caririsuchus, Itasuchus, Barreirosuchus, Pepesuchus, and MCT-1723-R. This last taxon showing large morphologic similarities with Pepesuchus and was classified like Pepesuchus sp. The relationships inside this clade always return polytomies, and they were recovered all solved. Notosuchia included a group of advanced forms comprising two clades, one of this is Baurusuchia, recovering the subfamilies Pissarrachampsinae and Baurusuchinae, but not finding Baurusuchus pachecoi and Baurusuchus salgadoensis like sister-taxa. The other clade inside Notosuchia is formed by Notosuchidae with a sister-group of a clade comprising by Morrinhosuchus and Sphagesauridae, with Labidiosuchus and Adamantinasuchus inside that family. Mariliasuchus robustus sharing several morphological similarities with Marliasuchus amarali,while the differences between both the taxa are resultants of sexual dimorphism. Therefore, M. robustus is a junior synonym of M. amarali. The results of Brooks Parsimony analysis is a General Area ...