Occurrence of "Nuages" and "Lamellae Anulata" during spermatogenesis in Dermatobia hominis (Diptera: Cuterebridae)

Abstract

Various types of "nuages" and "lamellae anulata" can be found during Dermatobia hominis spermatogenesis. In spermatogonia, the "nuages" occur as granules juxtaposed to the cytoplasmic face of the nuclear envelope or as cytoplasmic granules similar to glycogen granules. In spermatocytes, in addition to the "nuages", dense spherical bodies of approximately 1.0 µm in diameter are also observed. In the spermatids the "nuages" can be of the following types: perinuclear granules, spherical granules with diameters varying in length from 0.5 to 1.0 µm, granules similar to glycogen granules, granules with variable diameters which accumulate at the flagellum base forming the centriole adjunct, or remain in the cytoplasm. "Nuages" can also be observed in these cellular types as dense masses, without a definite outline and are common to animal germinal cells in general. The "lamellae anulata" on the other hand, are observed only in spermatocytes I and in early spermatids, being always immersed in electron-dense material of indefinite outline. In spermatids, the "lamellae anulata" are close to the nuclear envelope suggesting, in spite of opposing opinions, that these cells are envolved in the synthesis and transport of material from the nucleus to the cytoplasm

Spermiogenesis in three species of cicadas (Hemiptera: Cicadidae)

“…1970; Taffarel and Esponda 1980), and some authors suggest that it originates within the nucleus and moves through the nuclear pores (e.g. Cruz‐Landim 1979; Quagro‐Grassiotto and De Lello 1995). Troyer and Schwager (1982) showed that during spermiogenesis in Locusta migratoria , nuclear pores migrated and aggregated next to the site of formation of the centriolar adjunct material.…”

Presence of Cytoplasmic Organelle Chromatoid Body in Class Insecta

“…Doru lineare [14] Forficula auricularia [14] Diptera Dermatobia hominis [15] Drosophila melanogaster [16] …”