[1] Univ Fed Minas Gerais, Dept Quim, Belo Horizonte, MG, Brazil
[2] Univ Fed Minas Gerais, Dept Zool, Inst Ciencias Biol, Ave Antonio Carlos 6627,Campus UFMG, BR-31270901 Belo Horizonte, MG, Brazil
[3] Univ Fed Vicosa, Dept Biol Anim, Vicosa, MG, Brazil