Classificação macroscópica dos dentes de Nasua nasua

Abstract

Nasua nasua, also known as coati, is an omnivorous mammal, with wide distribution throughout South America, found from Colombia to Argentina and in Brazil it occupies all regions. The evolution caused in the teeth of mammals multiple variations, adapting the most diverse diets. Due to these variations, it is possible to classify vertebrates by order, gender and family. This work aimed to morphologically classify the teeth of males and females Nasua nausa, in order to classify and compare them with each other and with the morphology of Cannis familiaris (dogs) teeth described in the literature. In this study, five heads of Nasua nasua were used, adults, of both sexes, provided by the scientific breeding CECRIMPAS (UNIFEOB). Two macerated animals had their oral cavity exposed for the photographic documentation of the position of the teeth. In the oral cavity of Nasua nasua due to sexual dimorphism, it was possible to compare the male and female dentition macroscopically. The female has smaller teeth, rounded canines, and the incisor group on the lower part is smaller than on the upper and in the male they are pointed and larger. The animals presented 2x dental formula (I3 / 3, C1 / 1, P4 / 4, M2 / 2), with I = incisors, C = canines, P = premolars and M = molars, in a total of 40 teeth.