Fig. 2

Aedes aegypti  initial embyonic development. a Sectionated Chorion displaying the initial embryonic structure, b Anterior portion of the embryo containing the cephalic structure; c Germinal band (discreet embryo folding that outlying the interal layer of the egg), d Cranial portion of the embryo, e Embryo caudal portion, f Distinct embryos sequential development phases, g Embryonic cells internally outlying the oocyte, h Embryo yelk surrounded by active embryonic cells  i Exochorion outlined by the central tubercle and presenting a yelk in the embryo center (initial development), j Extension of the germinal band after 18 hours of embryonic development, k Embryonic cells at the beginning of embryonic development (5 hours), l Eggs exochorion displaying the central and periferical tubercles surronding the egg, m and n) Embryo cells at the begining of embryonic development (5 hours)