Fig. 27

Male reproductive apparatus of the sub-genus Opisthacanthus Peters, 1861. Opisthacanthus (Opisthacanthus) lecomtei (Lucas, 1858) (Cameroon, MHNG). Hemispermatophore (a – c). Pre- (d, e) and post-insemination (f – j) spermatophores. Lateral (a, d, g, h, i), anterior (b, e, j), contra-lateral (c), and dorsal (f) aspects. The white arrow shows the deep invagination of the basal edge of the capsule. The black arrow indicates the site and direction of semen expulsion. Abbreviations: aa (accessory apophysis), ah (accessory hook), cf (capsular foramen), cl (clasper), hos (holosolenos), hs (hemisolenos), lah (laminar hook). Scales, 2 mm (a, d–j), 1 mm (b, c)