FIGURE 16 in Sperm structure in Parasitidae mites (Parasitiformes: Mesostigmata: Gamasina)

FIGURE 16: Parasitus coleoptratorum, DIC (A), LM (B), spermatozoon cross sections in TEM (C-F). (A) Spermatozoon with anterior part containing nucleus (arrow) directed to the right. (B) Cross sections of spermatozoa filling deferent duct as visible is semithin Epon section. Dark rings of peripherally distributed ribbons (rb) are well discernible. (C) Extreme anterior end of spermatozoon packed with mitochondria (m). Note some material (asterisks) filling spaces between plasmalemma (arrow) and subplasmalemmal cisterns (sc). (D) Nuclear region showing nuclear material (n) containing a large chromatin granule (ch). Inclusion bodies (IB) with poorly discernible borders are filled with flocculent material of low electron density. (E) Section through the posterior end of nucleus (n) containing chromatin granule (ch), surrounded by inclusion bodies (IB) and mitochondria (m). (F) Postnuclear region; plasmalemma (arrow) and subplasmalemmal cisterns (sc) are in close apposition as in (D, E). Scale bars: 10 µm in (A, B); 1 µm in (C-F). Abbreviations: ch – chromatin, IB – inclusion body, m – mitochondrion, n – nucleus, rb – subplasmalemmal longitudinal ribbon, sc – subplasmalemmal cistern