0023-6152

AA00697606

24143

査読無

0023-6152

AA00697606

A male tick gives elongated spermatids to a female, that is, spermatogenesis within testes completes itself until elongated spermatids. And then elongated spermatids develop into mature sperms after they enter into the female genital tract via the spermatophore. In the present study, ultrastructural observations of spermatogenic cells were made at each stage of spermatogenesis in male Haemphysalis longicornis. Spermatogenic cells from spermatogonia to primary spermatocytes at the middle of their great growth phase were found in testes of unfed males. Subsequently, testes of H. longicomis are developed by feeding at their adult stage. The testes, or spermatogenic cells, were developed gradually until the 5-day feeding period was complete (the complete feeding stage). Spermatogenic cells at all stages from spermatogonia to elongated spermatids were contained in the testes of completely fed males. Spermatogenic cells were packed in cysts. Elongated spermatids which had been completed at the posterior ends of testes were made spermiation with the breakdown of the cyst cells. The spermatids were carried out of the testes through the central lumen. The cyst cells formed the lumen, and had some microvilli on their free surface.