dc:description"Fig. 35. Characteristics of synspermia of Scaphios yanayacu. A: Within the testis and proximal portion of the deferent ducts, the sperm conjugate is very voluminous, although the sperm cell components are restricted to a small portion that is located in the center of the synsperm. B: Furthermore, the vesicular area that surrounds the sperm cell components appears granular and the chromatin still looks spotty. C: Within the distal portion of the deferent ducts the cytoplasm of synspermia is compressed and numerous mitochondria are visible. D: Finally, the vesicular area is homogeneously electron dense. E: The microtubular pattern of the axoneme is hardly visible due to its electron density. The cytoplasm adjacent to the nuclei appears granular and presumably contains some glycogen. F: The anterior pole of nucleus is slightly indented.";
dc:description"Fig. 36. Characteristics of spermiogenesis of Scaphios yanayacu. A: Early spermatids are characterized by a peculiar chromatin-condensation pattern. B: The acrosomal vacuole of early spermatids possesses an enlarged subacrosomal space. C: In midspermatids the AV is surrounded by electron-dense material. D: Numerous membrane whirls are visible in close association to the elongating nucleus in mid- and late spermatids. E: A multilayered manchette of microtubules surrounds the nucleus for its most part; the AF that runs inside the nuclear canal clearly ends before the axonemal base (inset). F: At the end of spermiogenesis four spermatids fuse completely and arrange in the middle of the voluminous sperm conjugate.";