Cytological investigations were performed to clarify the karyotype of the somatic cells and behavior of the spermatogonial chromosomes in the spermatogenesis of Tomocerus kinoshitai, Collembola. Among the specimens used in this study, those kept in co...
Cytological investigations were performed to clarify the karyotype of the somatic cells and behavior of the spermatogonial chromosomes in the spermatogenesis of Tomocerus kinoshitai, Collembola. Among the specimens used in this study, those kept in constant room temperature(25±1℃) during winter were tested from mid November to the next May, and for cytological preparations the routin aceto-orcein and feulgen methods were employed. Tomocerus kinoshitai had a hexaploid germ-line in the male gonads, and its karyotype of both male and female was composed of 12 chromosomes in each somatic cells ; however, their large nuclei exhibited abundant chromatin diffusions, which were probably resulted from polyploidy.