• JoomlaWorks Simple Image Rotator
  • JoomlaWorks Simple Image Rotator
  • JoomlaWorks Simple Image Rotator
  • JoomlaWorks Simple Image Rotator
  • JoomlaWorks Simple Image Rotator
  • JoomlaWorks Simple Image Rotator
  • JoomlaWorks Simple Image Rotator
  • JoomlaWorks Simple Image Rotator
  • JoomlaWorks Simple Image Rotator
  • JoomlaWorks Simple Image Rotator
 
  Bookmark and Share
 
 
Master's Dissertation
DOI
10.11606/D.59.2016.tde-17122013-115412
Document
Author
Full name
Julio Cesar de Almeida Marsola
E-mail
Institute/School/College
Knowledge Area
Date of Defense
Published
Ribeirão Preto, 2013
Supervisor
Committee
Langer, Max Cardoso (President)
Klein, Wilfried
Santucci, Rodrigo Miloni
Title in Portuguese
Novos registros de ovos fósseis de vertebrados do Cretáceo Superior do Grupo Bauru
Keywords in Portuguese
Aves
Chelonii
Crocodyliformes
Grupo Bauru
Ovos fósseis
Abstract in Portuguese
Ovos fósseis de Crocodyliformes, Aves e Chelonii são artefatos reprodutivos incomuns, conhecidos a partir de registros em poucos países. Tornam-se ainda mais raros quando considerados apenas os achados oriundos de rochas mesozoicas. No Brasil, os registros são limitados à poucos ovos de Crocodyliformes do Cretáceo do Grupo Bauru, bem como um ovo de Chelonii de mesma idade. Desta forma, o presente estudo propôs-se a realizar a descrição de doze ovos fósseis coletados em Campina Verde-MG, e de outros dois provenientes de Álvares Machado e Pirapozinho, região de Presidente Prudente-SP, oriundos de rochas cretáceas (Grupo Bauru). Para tal, utilizou-se técnicas de análises ultraestruturais como Microscopia Eletrônica de Varredura, Espectrometria por Dispersão de Energia e Microscopia Óptica, além de Tomografia Computadorizada para verificar a ocorrência de embriões. Os resultados das análises sugerem a afinidade dos doze ovos de Campina Verde a Crocodyliformes e, pela topotipia do horizonte estratigráfico, a possível associação destes a Pissarrachampsa sera. Adicionalmente, o recorrente registro de ovos fósseis associados a restos esqueletais de crocodilianos notosúquios sugere um nível de cuidado parental presente no grupo. Já o espécime de Álvares Machado possui feições de Enantiornithes. Por fim, o ovo coletado em Pirapozinho possui características semelhantes às de ovos de quelônios Podocnemidae, o único grupo de Chelonii conhecido no afloramento de onde provém o ovo
Title in English
New occurrences of vertebrate fossil eggs from the Late Cretaceous of the Bauru Group
Keywords in English
Aves
Bauru Group
Chelonii
Crocodyliformes
Fossil eggs
Abstract in English
Amniotes fossil eggs, such as Crocodyliformes, Aves and Chelonii, are known from few places worldwide, and the Mesozoic records are particularly rare. Similarly, the occurrence of eggs of these groups is also rare in Brazil and limited to few crocodylian eggs and a single Chelonii one from Cretaceous rocks. This work aimed to describe twelve fossil eggs collected in Campina Verde-MG, and two additional eggs from Álvares Machado and Pirapozinho, SP, all from Bauru Group rocks (Upper Cretaceous). The ultrastructural traits of the shells were analyzed by Scanning Electron Microscopy, Energy Dispersive Spectroscopy and Optical Microscopy, in addition, Computadorized Tomography was applied to check the embryos occurrence. The twelve eggs from Campina Verde are associated to Crocodyliformes. In addition, the topotipic principle suggests an association of these eggs to the crocodyliform Pissarrachampsa sera. Additionally, the recurrent association of notosuchians fossil eggs and skeletal remains suggests a level of parental care in this group. The specimen from Álvares Machado is associated to Enantiornithes, and the egg from Pirapozinho shares traits with Podocnemidae eggs, which is the only known Chelonii group found in the outcrop where the egg came from
 
WARNING - Viewing this document is conditioned on your acceptance of the following terms of use:
This document is only for private use for research and teaching activities. Reproduction for commercial use is forbidden. This rights cover the whole data about this document as well as its contents. Any uses or copies of this document in whole or in part must include the author's name.
jcam.pdf (5.88 Mbytes)
Publishing Date
2016-08-16
 
WARNING: Learn what derived works are clicking here.
All rights of the thesis/dissertation are from the authors
CeTI-SC/STI
Digital Library of Theses and Dissertations of USP. Copyright © 2001-2020. All rights reserved.