FIGURE 14 in Sperm structure in Parasitidae mites (Parasitiformes: Mesostigmata: Gamasina)

FIGURE 14: Paracarpais kraepelini, spermatozoa, TEM. (A) Two spermatozoa sectioned through nuclear region showing different numbers of ribbons (rb); nucleus (n) with a large chromatin granule (ch) occupies most of the internal space, thus mitochondria (m) are mostly between ribbons since sIBs are absent. Note granular material (asterisk) located between plasmalemma (arrow) and subplasmalemmal cisterns (sc). (B) Nearly axial section through nuclear region demonstrating several large chromatin granules (ch) in nuclear material (n). Inset: bent spermatozoon with anterior end marked (arrow). (C, D) Postnuclear region in cross (C) and axial (D) section. Granular inclusion bodies (gIB) contain poorly organized granular material. Scale bars: 1 µm in (A-D); 10 µm in (B, inset). Abbreviations: ch – chromatin, gIB – granular inclusion body, m – mitochondrion, n – nucleus, rb – subplasmalemmal longitudinal ribbon, sc – subplasmalemmal cistern