Abstract
One hundred and three females and one hundred and thirteen males of Anocentor nitens were removed from ears of horses at the Rural University and all gnathossomes were kept under laboratorial conditions according to FLECHTMANN (1985). Morphological observation was undertaken aiming at the study of the hypostome, cheliceral digits and cheliceral sheaths, the relation between palpi segments and chaetotaxy, prosomal region and porose area. Analysis showed that characters or attributes of A. nitens are sex related. Sexual dimorphism was confirmed through the relation between the size of hypostome/palpi, the morphology of cheliceral digits and the presence of prosomal fovea only in female ticks. The other morphological characters were useful to validate A. nitens.

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Copyright (c) 1992 Nicolau Maués da Serra Freire, Rossana Virgílio de Barros
