|Support type:||Scholarships in Brazil - Master|
|Effective date (Start):||March 01, 2011|
|Effective date (End):||February 28, 2013|
|Field of knowledge:||Biological Sciences - Zoology - Paleozoology|
|Principal researcher:||Max Cardoso Langer|
|Grantee:||Júlio Cesar de Almeida Marsola|
|Home Institution:||Faculdade de Filosofia, Ciências e Letras de Ribeirão Preto (FFCLRP). Universidade de São Paulo (USP). Ribeirão Preto , SP, Brazil|
This project aims at the description of thirteen fossilized eggs of Crocodyliforms. The material includes three associations with four eggs in each, collected from outcrop of the Vale do Rio do Peixe Formation, in Campina Verde city, Minas Gerais State, and an additional egg from the municipality of Pirapozinho in the region of Presidente Prudente, São Paulo State,in sediments of the formation of the same name. This work presents the description of such eggs, characterizing macroscopic morphology such as shape and size, ornamentation and shell thickness as well as investigating its ultra-structure, like the bark of the units and their components (basal plate group, mammillary layer and columnar craters and absorption of calcium). These reviews involve the application of techniques of polarized light microscopy and scanning electron microscopy for ultrastructural analysis and Binocular Magnifier for macrostructural characteristics. These techniques are of fundamental importance to, beyond the description on the basis of comparative data in the literature, contextualize such as eggs parassistematic force. Eggs are tested for CT for the evaluation of evidence of embryonic remains. It also proposed the study of compositional aspects of the eggshell, in a comparative context with eggs of crocodilians living by the technique of energy dispersive spectrometry. There will also be held early taphonomic inferences to such associations of the eggs, based on data from experimental taphonomy in the literature, as in behavioral patterns of crocodilians, and aims a better understanding of the paleobiology of the group.