part_of adult spermatocyst adult prospermia Elongated spermatid Fig. 17-13;Fig. 17-14, Fig. 17-15, in Biology of Ticks ISBN:0-19-505910-7. Secondary spermatocyte TADS:0000485 TADS:0000485 These are the elongated spermatids that have undergone reduction division. These extremely elongated, haploid spermatids arenot capacitated, i.e., they are not yet capable of fertilizing the oocytes. In this form they migrate to the ejaculatory duct andinto the developing spermatophore whereupon they are transported to the vagina of the female. Capacitation of the inseminated prospermia takes place in the reproductive tract of the female. default_namespace cell