title: Frequency and duration of the stages of the cycle of the seminiferous epithelium of the nine-banded armadillo (Dasypus novemcinctus).
abstract: The majority of the cross-sections of seminiferous tubules of nine-banded armadillos show only one type of cellular association as in most eutherian and metatherian mammals with scrotal testes. The spermatogenic cycle was divided into 8 stages, in relation to the shedding of the spermatozoa. The relative frequencies (%) of stages 1-8 were, respectively: 16.6, 7.5, 12.9, 9.1, 9.7, 18., 11.7 and 13.6. The duration of the cycle was 8.15 days, as determined by intratesticular injection of [3H]thymidine and removing the tissue at different times after injection.
mesh_terms: D000818:Animals; D001135:Armadillos / Q000502:physiology*; D008297:Male; D010507:Periodicity; D012670:Seminiferous Epithelium / Q000502:physiology*; D012671:Seminiferous Tubules / Q000166:cytology; D013091:Spermatogenesis; D013094:Spermatozoa / Q000166:cytology; D013737:Testis / Q000502:physiology*; D004490:Xenarthra / Q000502:physiology*