COMPARATIVE STUDY OF PRENATAL DEVELOPMENT BETWEEN Myotis albescens (Chiroptera: Vespertilionidae) AND Eumops patagonicus (Chiroptera: Molossidae).

RODRIGUEZ FLORENCIA EVELYN; SANDOVAL MARIA TERESA; BLANCA BEATRIZ ALVAREZ; LOMBARDO DANIEL MARCELO

Buenos Aires

Congreso; REUNION CONJUNTA DE SOCIEDADES DE BIOCIENCIAS; 2017

SOCIEDADES DE BIOCIENCIAS

The order Chiroptera comprises two suborders, Megachiroptera and Microchiroptera, the Microchiroptera is cosmopolitan, within the order, exist a great diversity of study about reproductive biology. Notwithstanding, there is still important information gaps respect to different aspects of the embryonic development of bats, The staging system proposed for Carollia perspicillata is, the most complete and includes the embryo sequence from fertilization until the end of development, and is used as a reference table. Moreover, the characteristics of chorionic vesicle have not been considered in previous studies. The present study aimed to characterize the embryonic development of Myotis albacescens and Eumops patagonicus, two Center and South American species, widely and commonly distributed in northern Argentina.This study was realized using 60 specimens obtaining of wildlife. There are measured and photographed, and the embryonic stage was assigned what the staging system created for Carollia perspicillata. We observed that the chorionic vesicle, in both, showed similarities in the disposition of the extraembryonic membranes, but they differed in characteristics of yolk sac and chorioallantoic placenta, in E. patagonicus was more glandular than M. albescens. M. albescens presented a discoid placenta well developed with the caudal anti-mesometrial position, but E. patagonicus presented a diffuse placenta which persists until the final stages of gestation and a discoid placenta in the uterus tubal junction. Respect to the embryogenesis was recognized, in both, early stages (ES), middle stages (MS) and late stages (IS). In the ES, the embryonic morphology is similar. The MS is characterized by the muzzle and pinna formation, fore and hind limb regionalization, and the formation of the patagium primordium. In the IS, occur the overall growth of the embryo, of its fore and hind limbs, patagium, and the typical craniofacial features of each species are configured.