Showing papers on "Flying squirrel published in 1970"
TL;DR: It is suggested that in the flying squirrel the maturation of spermatozoa is accompanied by changes in their cohesive properties.
Abstract: In the upper caput epididymidis of Glaucomys volans, where epithelial cells have a high concentration of RNA in their apical cyto¬ plasm, spermatozoa form long cylindrical bodies. Spermatozoan tails, adhering together, fill the interior of the cylinder. Their heads, with closely attached cytoplasmic droplets, are regularly arranged on the periphery of the cylinder with acrosomes facing the epididymal epithe¬ lium. In subsequent segments of the epididymis, the cylindrical bodies become more compact and the sperm heads are drawn together in rouleaux. In the lower caput epididymidis, cylindrical bodies fragment and masses of individual spermatozoa or spermatozoa grouped in rouleaux fill the lumina of the duct. It is suggested that in the flying squirrel the maturation of spermatozoa is accompanied by changes in their cohesive properties.
22 citations
2 citations
TL;DR: The merocysts found in the two different species of flying squirrels are considered to belong to two separate parasites, one of which is identified as H. inornatus and the other is designated H. magnificus, a new subspecies named in honour of Dr Wu Chen-Lan who worked on flying squirrel malaria in Formosa.
Abstract: Merocysts in P. inornatus are found in the liver, spleen and lungs, while in P. magnificus the liver is the only site. In the former the protoplasmic rim is narrow and the merozoites are sparsely distributed within it; in the latter the protoplasmic rim is irregular, quite thick and broken in places. In the former, the colloidal mass is scanty, and is in the form of tenuous matrix enclosing irregular interspaces; in the latter form, the colloidal mass is in the form of homogeneous substance with little vacuolation. In view of the wide differences in the structure and the site of occurrence, the merocysts found in the two different species of flying squirrels are considered to belong to two separate parasites. The parasite occurring in P. inornatus is identified as H. rayi rayi Tokura & Wu, sensu stricto, while the other parasite occurring in P. magnificus is designated H. rayi wui, a new subspecies, named in honour of Dr Wu Chen-Lan who worked on flying squirrel malaria in Formosa.
2 citations