1. Department of Structural and Functional Biology; State University of Campinas; Av. Bertrand Russel s/n Campinas São Paulo Brazil
2. Department of Biology, Laboratory of Microscopy and Microanalysis; Univ. Estadual Paulista − UNESP; Rua Cristóvão Colombo São José do Rio Preto São Paulo Brazil
3. Department of Histology, Embryology and Cell Biology; Federal University of Goiás; Samambaia II Goiânia Goiás 74001970 Brazil
4. Department of Biology, Laboratory of Microscopy and Microanalysis; São Paulo State University; 2265, Cristóvão Colombo Street, Jardim Nazareth São José do Rio Preto São Paulo 15054-000 Brazil