The purpose of the present study was to examine the seminiferous epithelium cycle of Bombina orientalis using a light microscope. The cycle was divided into a total of 10 stages, according to the morphological characteristics of the cells. The spermatogenetic cells included primary spermatogonia, secondary spermatogonia, primary spermatocytes, secondary spermatocytes, spermatid and sperm. At stageⅠ, the primary spermatogonia was located closer to basal lamina of the seminiferous tubule without spermatocyst formations. Especially at the stage Ⅱ, the secondary spermatogonia were located in the spermatocyst. The primary and secondary spermatocytes were found from stages Ⅲ to Ⅵ. The secondary spermatocytes were smaller in size than the primary spermatocytes, but they had thicker nucleoplasm and smaller nuclei. The round-shaped, early sperm cells were formed in stage Ⅶ, and further divided at stage Ⅷ to have more concentrated nucleoplasm before division to matured sperm cells. At stage Ⅹ, the matured sperm cells emerged from the spermatocyst. Considering the above results, this study presented the special characteristics in the generation and type of sperm formation. The germ cell formation occurred in various stages, like the perspectives of Franca et al (1999), ultimately, providing taxonomically useful information.

The seminiferous epithelium cycle and developmental stages of spermatids in Clethrionomys rufocanus were observed under a light microscope. The seminiferous epithelium cycle was divided into 8 stages. Type Ad spermatogonia appeared through all stages. Type Ap, In, and B spermatogonia appeared in stages Ⅰ, Ⅱ, Ⅲ, and Ⅳ. In the first meiosis prophase, the leptotene spermatocytes appeared from stage Ⅴ, the zygotene spermatocytes in stages Ⅰ, Ⅵ, Ⅶ, Ⅷ, the pachytene spermatocytes from stages Ⅱ to Ⅵ, the diplotene spermatocytes in stage Ⅶ. The meiotic figures and interkinesis spermatocytes were observed in stage Ⅷ. Developing spermatids were subdivided into 10 steps, based on the morphological characteristics such as the acrosome formation changes in spermatozoa, nucleus, cytoplasm, and spermiation changes. The C. rufocanus spermatocytogenesis and spermiogenesis results displayed similar results with Apodemus agrarius coreae and A. speciosus peninsulae. Considering all the results, the spermatogenesis may be useful information to analyze the differentiation of spermatogenic cells and the breeding season.

본 연구는 흰넓적다리 붉은쥐(Apodemus speciosus peninsulae)의 세정관 상피주기와 정자세포의 발달 단계를 광학 현미경을 사용하여 조사하였다. 세정관 상피주기는 정모세포의 분화단계와 정자세포의 발달단계를 기초로 하여 9 stages로 나누었다. Ad형 정원세포의 경우 모든 단계에서 관찰되었다. Ap형의 정원세포는 I 단계, In형의 정원세포는 II와 III 단계, B형의 정원세포는 IV 단계에서 관찰되었다. 제 1 감수분열의 전기에

제주땃쥐(Crocidura dsinezumi)의 세정관 상피 주기와 정자세포의 형태적인 특징을 알아보기 위하여 조사하였다. 제주땃쥐의 세정관 상피 주기는 12 stages로 구분되어졌다. Ad형 정원세포는 모든 단계에서 관찰되어졌으며, In형 정원세포는 IV단계에서, B형 정원세포는 V단계와 VI단계에서 관찰되었다. 정자세포의 첨체 발달과 핵의 형태적 변화는 14 steps로 구분되어졌다. 골지, 두모, 첨체, 성숙 및 이탈단계는 각각 및 14 step