Caracterização macroscópica do aparelho reprodutor masculino da Guaiaquica

Abstract

The guaiquica (Gracilinanus microtarsus), belongs to the family Didelphidae, which is a very important family among marsupials, because in addition to containing many species (like opossums), it represents the model group of marsupials. Marsupial ancestors, from the Cretaceous period, had morphological characteristics very similar to those of neotropical skunks today. For this reason, their reproductive adaptations are considered directly related to primitive marsupials, and this similarity is of great interest for the comparative study of their reproductive biology. The male genital system is the set of organs that form, emit and introduce the fertilizing liquid, sperm or semen. , in the pathways of the female genital system during copulation. For this research, 3 males of adult marquisupials (Gracilinanus Microtarsus) were used, which were already fixed in 10% folmaldehyde solution; provided by the Morphological Sciences Research laboratory of the University Center “Fundação de Ensino Octávio Bastos” - UNIFEOB. The male reproductive system was dissected and photographed. The information pertinent to the morphology of each organ was analyzed, described and photo documented. It is concluded that the male genital system guaiquica is similar to that of possums and consists of a pair of testicles, epididymis, deferent ducts, prostate, bulbourethral glands and bifid penis.