FIGURES 25–35. Proteocephalus synodontis Woodland, 1925 in Tapeworms (Cestoda: Proteocephalidea) of Synodontis spp. (Siluriformes) in Africa: survey of species and their redescriptions

FIGURES 25–35. Proteocephalus synodontis Woodland, 1925 from Synodontis schall, Lake Turkana, Kenya (25–33) and P. membranacei from S. membranacea, Lake Chad, Chad. 25. Scolex, dorsoventral view (note accumulation of gland cells in the apical region—gc). 26. Scolex, longitudinal section. 27, 28, 34, 35. Cross sections of pregravid proglottides at the level of ovary (27, 34), cirrus-sac (28) and testes (35). 29. Premature proglottis, dorsal view. 30, 31. Gravid proglottides of different shape, ventral view. 32. Pregravid proglottis, ventral view. 33. Terminal genitalia, ventral view (note vaginal sphincter—vs). Fig. 34—syntype of P. membranacei (MNHNP 1116H); Fig. 35—syntype of P. largoproglottis (= syn. of P. membranacei; MNHNP 1115H). Abbreviations: cm—circular musculature of suckers; cs—cirrus-sac; do—dorsal osmoregulatory canals; dv—dorsoventral muscle fibres; gc—gland cells; lm—longitudinal internal musculature; mg—Mehlis' gland; od—oviduct; ov—ovary; sc—secondary osmoregulatory canals; sd—sperm duct (vas deferens); te—testes; ud—uterine diverticulum; uouterine orifice; ut—uterus; vd—vitelloduct; vi—vitelline follicles; vo—ventral osmoregulatory canals; vs—vaginal sphincter. Scale bars = 500 μm (25–32, 34, 35); 250 µm (33).