Diplonychus rusticus (testis) 11 spermatogonial metaphase 12 spermatogonial anaphase 13–16 primary spermatocytes: 13 leptotene 14 pachytene 15 diffuse stage 16a, b metaphase I 17, 18 secondary spermatocytes: 17 a, b metaphase II 18 anaphase II. Scale bar:10 μm.

 
 
  Part of: Stoianova D, Simov N, Vu MQ, Nguyen DM, Grozeva S (2020) New data on karyotype, spermatogenesis and ovarian trophocyte ploidy in three aquatic bug species of the families Naucoridae, Notonectidae, and Belostomatidae (Nepomorpha, Heteroptera). Comparative Cytogenetics 14(1): 139-156. https://doi.org/10.3897/CompCytogen.v14i1.48709