S. Maeda et al., CLASSIFICATION OF THE CYCLE OF THE SEMINIFEROUS EPITHELIUM IN THE COMMON TREE SHREW (TUPAIA-GLIS), Journal of veterinary medical science, 58(5), 1996, pp. 481-484
The classification of the cycle of the seminiferous epithelium was car
ried out in the common tree shrew (Tupaia glis). The tree shrew captur
ed in Thailand were fixed with Bouin's fixative, embedded in paraffin
wax, and stained with PAS-hematoxylin. The cycle was classified into t
welve stages on the basis of the acrosomal changes of spermatids. Rela
tive frequencies of stages from I to XII were 11.9, 7.2, 8.9, 22.5, 12
.9, 9.7, 8.0, 5.9, 4.0, 3.2, 2.9, and 3.6%, respectively. Different st
ages did not appear in a cross-sectioned tubule as did in primates. Th
e head of matured spermatid was discoidal in shape and different from
that of primates and rodents. Spermatogenesis of the common tree shrew
is different from that of primates and rodents according to its morph
ological features.