Larvae from Amblyomma nodosum Neumann, 1899 from engorged female ticks removed from Tamandua tetradactyla (Linnaeus, 1758) were obtained under laboratory conditions. Two hundred and nineteen larvae were examined under brightfiel microscopy with and imersion objective and confocal laser scanning microscopy in order to analyze the variation of the number of internal setae of the right and left side of the Haller's organ chamber. The mean number of internal setae was 5,06±0,71, with parametric valves of 4-11 setae.
Wild hosts; immature stage; ixodids; mammals; tick
