FIGURES 21–23 in Towards resolving the problematic status of the digenean genus Astiotrema Looss 1900: Taxa excluded from Astiotrema (sensu stricto) with special reference to plagiorchioid genera closely related to the restricted concept of Astiotrema

FIGURES 21–23. Kalipharynx piramboae Boeger & Thatcher, 1983 and intra-specific variation observed in Pseudoparamacroderoides seenghali Gupta & Agrawal, 1968. 21. K. piramboae Boeger & Thatcher, 1983, ventral view, redrawn from Boeger & Thatcher (1983, fig. 1). 22. P. seenghali, ventral view, redrawn from Gupta & Agrawal (1968, p. 71). 23. P. seenghali (syn. Pseudoparamacroderoides vittati Kakaji, 1969), dorsal view, redrawn from Kakaji (1969, fig. 10). Abbreviations: AT, anterior testis; BS, body spines; Ce, cecum; CP, cirrus-pouch; ED, ejaculatory duct; EP, excretory pore; Es, esophagus; EV, excretory vesicle; GP, genital pore; LT, left testis; MG, Mehlis' gland; OS, oral sucker; Ov, ovary; PC, prostatic cells; Ph, pharynx; PP, pars prostatica; PT, posterior testis; RT, right testis; SR, seminal receptacle; SV, seminal vesicle; Ut, uterus; VD, vitelline duct; VF, vitelline follicle; VS, ventral sucker. Scale bars: Fig. 21 = 500 µm; Fig. 22 = 500 µm; Fig. 23 = 500 µm.