1. Univ. Estadual Paulista - UNESP; Department of Biology; Laboratory of Microscopy and Microanalysis; Rua Cristóvão Colombo, São José do Rio Preto São Paulo Brazil
2. Department of Structural and Functional Biology; State University of Campinas; Av. Bertrand Russel s/n Campinas São Paulo Brazil
3. Department of Morphology; Federal University of Goiás; Samambaia II Goiânia Goiás Brazil