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  • About
  • The Global ETD Search service is a free service for researchers to find electronic theses and dissertations. This service is provided by the Networked Digital Library of Theses and Dissertations.
    Our metadata is collected from universities around the world. If you manage a university/consortium/country archive and want to be added, details can be found on the NDLTD website.
1

Alterações ante mortem e pseudopatologias em exoesqueleto de cingulados pleistocênicos de grande porte da região intertropical brasileira / Ante mortem alterations and pseudopathologies in exoskeleton of pleistocenic large body-mass cingulates from the brazilian intertropical region

Lima, Fábio Cunha Guimarães de 22 February 2017 (has links)
Submitted by Lara Oliveira (lara@ufersa.edu.br) on 2017-09-12T22:15:43Z No. of bitstreams: 1 FábioCGL_DDISERT.pdf: 2278528 bytes, checksum: 896534b24761eed81c350463209426cc (MD5) / Approved for entry into archive by Vanessa Christiane (referencia@ufersa.edu.br) on 2017-10-27T13:04:36Z (GMT) No. of bitstreams: 1 FábioCGL_DDISERT.pdf: 2278528 bytes, checksum: 896534b24761eed81c350463209426cc (MD5) / Approved for entry into archive by Vanessa Christiane (referencia@ufersa.edu.br) on 2017-10-27T13:04:56Z (GMT) No. of bitstreams: 1 FábioCGL_DDISERT.pdf: 2278528 bytes, checksum: 896534b24761eed81c350463209426cc (MD5) / Made available in DSpace on 2017-10-27T13:08:17Z (GMT). No. of bitstreams: 1 FábioCGL_DDISERT.pdf: 2278528 bytes, checksum: 896534b24761eed81c350463209426cc (MD5) Previous issue date: 2017-02-22 / Coordenação de Aperfeiçoamento de Pessoal de Nível Superior / The order Cingulata is one of the most representative members of the Pleistocene Brazilian Megafauna. It is composed by well-known animals (armadillos, pampatheres and glyptodonts) and characterized by a peculiar bony exoesqueleton. Several studies in paleoecology of cingulates involve this peculiar structure, whatever, few studies have directed their attention to pathological alterations in the exoskeleton, despite its great potential in terms of paleobiological information. The aim of this work was to describe and identify exoskeletal diseases in large cingulates from the Pleistocene of the Brazilian Intertropical Region, providing new paleoecological insights for such animals. We analyzed exoskeletal elements collected in six localities of the Brazilian Intertropical Region deposited in three relevant fossil collections in the states of Minas Gerais, Pernambuco and Rio Grande do Norte. Through macroscopic examination, we have detected pathological and pseudopathological alterations affecting the surface of components of the exoskeleton in specimens of Hoplophorus euphractus, Panochuthus sp., Glyptotherium sp. and Pachyarmatherium brasiliense. These lesions included traumatic and infectious alterations generated by parasites in different parts of exoskeleton and the first records of lesions caused by fleas in glypdonts and in a large non-glyptodontid cingulate (Pachyarmatherium). Finally, we verified the presence of pseudopathologies, which served as a base for we propose a protocol to differentiate pathological to taphonomical alterations / Na Megafauna Brasileira do Pleistoceno, a Ordem Cingulata, um dos principais integrantes da megafauna brasileira do Pleistoceno, é composta por animais bastante conhecidos (tatus, pampatérios e gliptodontes) e caracterizados por um peculiar exoesqueleto ósseo. Muitos estudos em paleoecologia de cingulados envolvem esta estrutura, no entanto, poucos trabalhos têm direcionado a atenção para alterações patológicas do exoesqueleto, embora se reconheça o seu enorme potencial em termos de informações paleobiológicas. O objetivo deste trabalho foi identificar e descrever alterações exoesqueletais em cingulados de grande porte do Pleistoceno da Região Intertropical Brasileira, fornecendo novos insights paleoecológicos sobre esses animais. Analisamos componentes do exoesqueleto coletados em seis localidades da Região Intertropical Brasileira depositados em três coleções relevantes nos estados de Minas Gerais, Pernambuco e Rio Grande do Norte. Por meio de exame macroscópico, detectamos alterações patológicas em superfícies ósseas acometendo o exoesqueleto em espécimes de Hoplophorus euphractus, Panochuthus sp., Glyptotherium sp. e Pachyarmatherium brasiliense. Estas lesões constituíram alterações traumáticas e infecciosas geradas por parasitas em diferentes partes do exoesqueleto e os primeiros registros de lesões causadas por pulgas em diferentes espécies de gliptodontes. Finalmente, constatamos a presença de pseudopatologias, as quais serviram de base para propormos um protocolo para diferenciar alterações patológicas de tafonômicas / 2017-09-12

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