Ultrastructure of spermiogenesis and spermatozoa of Decadidymus gulosus, Temnocephala dendyi, T. minor, Craspedella sp., C. spenceri and Diceratocephala boschmai (Platyhelminthes, Temnocephalida, Temnocephalidae), with emphasis on the intercentriolar body and zone of differentiation

摘要: Summary Examination of the ultrastructure spermiogenesis and mature sperm in six species Temnocephalidae revealed origin spiral region microtubules shaft. The is characteristic many Temnocephalida but absent from other platyhelminth taxa. During spermiogenesis, an electron-dense heel develops from, or adjacent to, outer plates intercentriolar body zone differentiation. splits into two halves, each which remains attached to one basal via dense heel. entire anchoring apparatus flagellum, consisting body, striated rootlet heel, rotates around spermatid shaft until bodies lie parallel other. This rotation causes compression semi-circular rows originate on opposite sides row compressed a tight horseshoe shape with material b...