FIGURES 1–3 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 1–3. Intra-specific variations observed in Plesioastiotrema monticellii (Stossich, 1904) n. comb. 1. P. monticellii (syns. Distomum signatum of Monticelli, 1891 nec Dujardin, 1845; Astiotrema monticellii Stossich, 1904), ventral view, redrawn from Stossich (1904, fig. 3). 2. P. monticellii (syn. A. monticellii), ventral view, redrawn from Dollfus (1957, fig. 3). 3. P. monticellii (syn. A. monticellii), dorsal view, redrawn from Timofeeva (1961, fig. 1). Abbreviations: AT, anterior testis; Ce, cecum; CP, cirrus-pouch; EP, excretory pore; Es, esophagus; EV, excretory vesicle; GP, genital pore; LC, Laurer's canal; Me, metraterm; OS, oral sucker; Ov, ovary; Ph, pharynx; PP, pars prostatica; PT, posterior testis; SR, seminal receptacle; SV, seminal vesicle; Ut, uterus; VD, vitelline duct; V-D, vas-deferens; VF, vitelline follicle; VR, vitelline reservoir; VS, ventral sucker. Scale bars: Fig. 1 = 500 µm; Fig. 2 = 500 µm; Fig. 3 = 500 µm.