taxonID	type	format	identifier	references	title	description	created	creator	contributor	publisher	audience	source	license	rightsHolder	datasetID
5046879BFFDEA5094D86FD9E5E98FCF5.taxon	http://purl.org/dc/dcmitype/StillImage	image/png	https://zenodo.org/record/5027484/files/figure.png	https://doi.org/10.5281/zenodo.5027484	FIGURES 1–5. Astiotrema reniferum (Looss, 1898) Looss, 1900 revealing some intra-specific variations in esophagus extension, vitellarium distribution and maturation, testes configuration, and ovary shape. 1. A. reniferum (Syn. Distomum unicum Looss, 1896 nec Molin, 1859), ventral view, redrawn from Looss (1896, fig. 20). 2. A. reniferum (Syn. Astiotrema giganticum Tiwari, 1958), dorsal view, redrawn from Tiwari (1958, fig. 1). 3. A. reniferum (Syn. Astiotrema thapari Gupta, 1954), ventral view, redrawn from Gupta (1954, fig. 4). 4. A. reniferum (Syn. Astiotrema loossii Mehra, 1931), dorsal view, redrawn from Mehra (1931b, p. 187). 5. A. reniferum (Syn. A. loossii), ventral view, redrawn from Dwivedi (1966, fig. 2). Abbreviations: AT, anterior testis; Ce, cecum; CP, cirrus-pouch; Eg, eggs; EP, excretory pore; Es, esophagus; EV, excretory vesicle; GP, genital pore; LC, Laurel’s canal; Oo, oötype; 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; VS, ventral sucker. Scale bars: Fig. 1 = 1,000 µm; Fig. 2 = 2,000 µm; Fig. 3 =2,000 µm; Fig. 4 = 500 µm; Fig. 5 = 1,000 µm.	FIGURES 1–5. Astiotrema reniferum (Looss, 1898) Looss, 1900 revealing some intra-specific variations in esophagus extension, vitellarium distribution and maturation, testes configuration, and ovary shape. 1. A. reniferum (Syn. Distomum unicum Looss, 1896 nec Molin, 1859), ventral view, redrawn from Looss (1896, fig. 20). 2. A. reniferum (Syn. Astiotrema giganticum Tiwari, 1958), dorsal view, redrawn from Tiwari (1958, fig. 1). 3. A. reniferum (Syn. Astiotrema thapari Gupta, 1954), ventral view, redrawn from Gupta (1954, fig. 4). 4. A. reniferum (Syn. Astiotrema loossii Mehra, 1931), dorsal view, redrawn from Mehra (1931b, p. 187). 5. A. reniferum (Syn. A. loossii), ventral view, redrawn from Dwivedi (1966, fig. 2). Abbreviations: AT, anterior testis; Ce, cecum; CP, cirrus-pouch; Eg, eggs; EP, excretory pore; Es, esophagus; EV, excretory vesicle; GP, genital pore; LC, Laurel’s canal; Oo, oötype; 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; VS, ventral sucker. Scale bars: Fig. 1 = 1,000 µm; Fig. 2 = 2,000 µm; Fig. 3 =2,000 µm; Fig. 4 = 500 µm; Fig. 5 = 1,000 µm.	2021-06-23	Karar, Yasser F. M.;Blend, Charles K.;Dronen, Norman O.;Adel, Asmaa		Zenodo	biologists	Karar, Yasser F. M.;Blend, Charles K.;Dronen, Norman O.;Adel, Asmaa			
5046879BFFD3A50D4D86FC5A5CD2FB9D.taxon	http://purl.org/dc/dcmitype/StillImage	image/png	https://zenodo.org/record/5027487/files/figure.png	https://doi.org/10.5281/zenodo.5027487	FIGURES 6–8. Intra-specific variations observed in Astiotrema impletum (Looss, 1899) Looss, 1900. 6. A. impletum (Syn. Astiotrema varanum [Verma, 1930] Mukherjee & Ghosh, 1970), dorsal view, redrawn from Verma (1930, fig. B). 7. A. impletum, dorsal view, redrawn from El-Naffar et al. (1984, fig. 2a). 8. A. impletum (Syn. Astiotrema sudarshani Mukherjee & Ghosh, 1970), ventral view, redrawn from Mukherjee & Ghosh (1970, fig. 1). Abbreviations: AT, anterior testis; Ce, cecum; CP, cirrus-pouch; EA, excretory arm; EP, excretory pore; Es, esophagus; EV, excretory vesicle; GP, genital pore; OS, oral sucker; Ov, ovary; Ph, pharynx; PP, pars prostatica; PT, posterior testis; SR, seminal receptacle; SV, seminal vesicle; Ut, uterus; VF, vitelline follicle; VS, ventral sucker. Scale bars: Fig. 6 = 500 µm; Fig. 7 = 1,000 µm; Fig. 8 = 500 µm.	FIGURES 6–8. Intra-specific variations observed in Astiotrema impletum (Looss, 1899) Looss, 1900. 6. A. impletum (Syn. Astiotrema varanum [Verma, 1930] Mukherjee & Ghosh, 1970), dorsal view, redrawn from Verma (1930, fig. B). 7. A. impletum, dorsal view, redrawn from El-Naffar et al. (1984, fig. 2a). 8. A. impletum (Syn. Astiotrema sudarshani Mukherjee & Ghosh, 1970), ventral view, redrawn from Mukherjee & Ghosh (1970, fig. 1). Abbreviations: AT, anterior testis; Ce, cecum; CP, cirrus-pouch; EA, excretory arm; EP, excretory pore; Es, esophagus; EV, excretory vesicle; GP, genital pore; OS, oral sucker; Ov, ovary; Ph, pharynx; PP, pars prostatica; PT, posterior testis; SR, seminal receptacle; SV, seminal vesicle; Ut, uterus; VF, vitelline follicle; VS, ventral sucker. Scale bars: Fig. 6 = 500 µm; Fig. 7 = 1,000 µm; Fig. 8 = 500 µm.	2021-06-23	Karar, Yasser F. M.;Blend, Charles K.;Dronen, Norman O.;Adel, Asmaa		Zenodo	biologists	Karar, Yasser F. M.;Blend, Charles K.;Dronen, Norman O.;Adel, Asmaa			
5046879BFFD3A50D4D86FC5A5CD2FB9D.taxon	http://purl.org/dc/dcmitype/StillImage	image/png	https://zenodo.org/record/5027491/files/figure.png	https://doi.org/10.5281/zenodo.5027491	FIGURES 9–11. Intra-specific variations observed in Astiotrema impletum (Looss, 1899) Looss, 1900 from the present study. 9. Voucher specimen of A. impletum, ventral view. 10. Voucher specimen of A. impletum, ventral view. 11. Voucher specimen of A. impletum, dorsal view.Abbreviations:AT, anterior testis; Ce, cecum; CP, cirrus-pouch; EP, excretory pore; Es, esophagus; GP, genital pore; MG, Mehlis’ gland; OD, ovarian duct; OS, oral sucker; Ov, ovary; Ph, pharynx; PP, pars prostatica; PT, posterior testis; SR, seminal receptacle; SV, seminal vesicle; Ut, uterus; VF, vitelline follicle; VS, ventral sucker. Scale bars: Fig. 9 = 500 µm; Fig. 10 = 500 µm; Fig. 11 = 500 µm.	FIGURES 9–11. Intra-specific variations observed in Astiotrema impletum (Looss, 1899) Looss, 1900 from the present study. 9. Voucher specimen of A. impletum, ventral view. 10. Voucher specimen of A. impletum, ventral view. 11. Voucher specimen of A. impletum, dorsal view.Abbreviations:AT, anterior testis; Ce, cecum; CP, cirrus-pouch; EP, excretory pore; Es, esophagus; GP, genital pore; MG, Mehlis’ gland; OD, ovarian duct; OS, oral sucker; Ov, ovary; Ph, pharynx; PP, pars prostatica; PT, posterior testis; SR, seminal receptacle; SV, seminal vesicle; Ut, uterus; VF, vitelline follicle; VS, ventral sucker. Scale bars: Fig. 9 = 500 µm; Fig. 10 = 500 µm; Fig. 11 = 500 µm.	2021-06-23	Karar, Yasser F. M.;Blend, Charles K.;Dronen, Norman O.;Adel, Asmaa		Zenodo	biologists	Karar, Yasser F. M.;Blend, Charles K.;Dronen, Norman O.;Adel, Asmaa			
5046879BFFD7A50F4D86FB895DE7FBD5.taxon	http://purl.org/dc/dcmitype/StillImage	image/png	https://zenodo.org/record/5027493/files/figure.png	https://doi.org/10.5281/zenodo.5027493	FIGURES 12–14. Astiotrema ranarum (Mehra & Negi, 1926) Fotedar, 1971 revealing some slight intra-specific variations. 12. A. ranarum (Syn. Centrovitus pentadelphi Bhalerao, 1926), dorsal view, redrawn from Bhalerao (1926, fig. 1). 13. A. ranarum (Syn. Tremiorchis ranarum Mehra & Negi, 1926), dorsal view, redrawn from Mehra & Negi (1926, fig. 2). 14. A. ranarum (Syn. Tremiorchis mehrai Rai, 1962), dorsal view, redrawn from Rai (1962, p. 382).Abbreviations: AT, anterior testis; Ce, cecum; Ci, cirrus; CP, cirrus-pouch; ED, ejaculatory duct; EP, excretory pore; Es, esophagus; EV, excretory vesicle; GP, genital pore; MG, Mehlis’ gland; OS, oral sucker; Ov, ovary; Ph, pharynx; PP, pars prostatica; PT, posterior testis; SR, seminal receptacle; SV, seminal vesicle; Ut, uterus; VD, vitelline duct; VF, vitelline follicle; VR, vitelline reservoir; VS, ventral sucker. Scale bars: Fig. 12 = 500 µm; Fig. 13 = 500 µm; Fig. 14 = 500 µm.	FIGURES 12–14. Astiotrema ranarum (Mehra & Negi, 1926) Fotedar, 1971 revealing some slight intra-specific variations. 12. A. ranarum (Syn. Centrovitus pentadelphi Bhalerao, 1926), dorsal view, redrawn from Bhalerao (1926, fig. 1). 13. A. ranarum (Syn. Tremiorchis ranarum Mehra & Negi, 1926), dorsal view, redrawn from Mehra & Negi (1926, fig. 2). 14. A. ranarum (Syn. Tremiorchis mehrai Rai, 1962), dorsal view, redrawn from Rai (1962, p. 382).Abbreviations: AT, anterior testis; Ce, cecum; Ci, cirrus; CP, cirrus-pouch; ED, ejaculatory duct; EP, excretory pore; Es, esophagus; EV, excretory vesicle; GP, genital pore; MG, Mehlis’ gland; OS, oral sucker; Ov, ovary; Ph, pharynx; PP, pars prostatica; PT, posterior testis; SR, seminal receptacle; SV, seminal vesicle; Ut, uterus; VD, vitelline duct; VF, vitelline follicle; VR, vitelline reservoir; VS, ventral sucker. Scale bars: Fig. 12 = 500 µm; Fig. 13 = 500 µm; Fig. 14 = 500 µm.	2021-06-23	Karar, Yasser F. M.;Blend, Charles K.;Dronen, Norman O.;Adel, Asmaa		Zenodo	biologists	Karar, Yasser F. M.;Blend, Charles K.;Dronen, Norman O.;Adel, Asmaa			
5046879BFFD5A5114D86FB3A5EDBFE21.taxon	http://purl.org/dc/dcmitype/StillImage	image/png	https://zenodo.org/record/5027497/files/figure.png	https://doi.org/10.5281/zenodo.5027497	FIGURES 15 & 16. Intra-specific variations observed in Astiotrema emydis Ejsmont, 1930. 15. A. emydis, dorsal view, redrawn from Ejsmont (1930, fig. 1). 16. A. emydis, ventral view, redrawn from Modrzejewska (1938, fig. 1). Abbreviations:AT, anterior testis; Ce, cecum; CP, cirrus-pouch; EP, excretory pore; Es, esophagus; EV, excretory vesicle; GP, genital pore; OD, ovarian duct; OS, oral sucker; Ov, ovary; P.Ph, prepharynx; 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. 15 = 500 µm; Fig. 16 = 500 µm.	FIGURES 15 & 16. Intra-specific variations observed in Astiotrema emydis Ejsmont, 1930. 15. A. emydis, dorsal view, redrawn from Ejsmont (1930, fig. 1). 16. A. emydis, ventral view, redrawn from Modrzejewska (1938, fig. 1). Abbreviations:AT, anterior testis; Ce, cecum; CP, cirrus-pouch; EP, excretory pore; Es, esophagus; EV, excretory vesicle; GP, genital pore; OD, ovarian duct; OS, oral sucker; Ov, ovary; P.Ph, prepharynx; 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. 15 = 500 µm; Fig. 16 = 500 µm.	2021-06-23	Karar, Yasser F. M.;Blend, Charles K.;Dronen, Norman O.;Adel, Asmaa		Zenodo	biologists	Karar, Yasser F. M.;Blend, Charles K.;Dronen, Norman O.;Adel, Asmaa			
5046879BFFCBA5124D86FE2E5C88FAA5.taxon	http://purl.org/dc/dcmitype/StillImage	image/png	https://zenodo.org/record/5027499/files/figure.png	https://doi.org/10.5281/zenodo.5027499	FIGURES 17–20. Intra-specific variations observed in Astiotrema odhneri Bhalerao, 1936. 17. A. odhneri (Syn. Astiotrema reniferum of Odhner, 1911 nec Looss, 1898), ventral view, redrawn from Yeh & Fotedar (1958, fig. 5) after Odhner (1911). 18. A. odhneri (Syn. Astiotrema hanumantharai Dhanumkumari, 1999), ventral view, redrawn from Dhanumkumari (1999, fig. 1). 19. A. odhneri (Syn. Astiotrema nathi Gupta, 1954), ventral view, redrawn from Gupta (1954, fig. 1). 20. A. odhneri (Syn. Astiotrema sudanensis Khalil, 1959), dorsal view, redrawn from Khalil (1954, fig. 1). Abbreviations: AT, anterior testis; Ce, cecum; CP, cirrus-pouch; Es, esophagus; GP, genital pore; MG, Mehlis’ gland; Oo, oötype; 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, vasdeferens; VF, vitelline follicle; VS, ventral sucker. Scale bars: Fig. 17 = 1,000 µm; Fig. 18 = 1,000 µm; Fig. 19 = 500 µm; Fig. 20 = 500 µm.	FIGURES 17–20. Intra-specific variations observed in Astiotrema odhneri Bhalerao, 1936. 17. A. odhneri (Syn. Astiotrema reniferum of Odhner, 1911 nec Looss, 1898), ventral view, redrawn from Yeh & Fotedar (1958, fig. 5) after Odhner (1911). 18. A. odhneri (Syn. Astiotrema hanumantharai Dhanumkumari, 1999), ventral view, redrawn from Dhanumkumari (1999, fig. 1). 19. A. odhneri (Syn. Astiotrema nathi Gupta, 1954), ventral view, redrawn from Gupta (1954, fig. 1). 20. A. odhneri (Syn. Astiotrema sudanensis Khalil, 1959), dorsal view, redrawn from Khalil (1954, fig. 1). Abbreviations: AT, anterior testis; Ce, cecum; CP, cirrus-pouch; Es, esophagus; GP, genital pore; MG, Mehlis’ gland; Oo, oötype; 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, vasdeferens; VF, vitelline follicle; VS, ventral sucker. Scale bars: Fig. 17 = 1,000 µm; Fig. 18 = 1,000 µm; Fig. 19 = 500 µm; Fig. 20 = 500 µm.	2021-06-23	Karar, Yasser F. M.;Blend, Charles K.;Dronen, Norman O.;Adel, Asmaa		Zenodo	biologists	Karar, Yasser F. M.;Blend, Charles K.;Dronen, Norman O.;Adel, Asmaa			
5046879BFFC8A5144D86FAAA5BE5FD95.taxon	http://purl.org/dc/dcmitype/StillImage	image/png	https://zenodo.org/record/5027501/files/figure.png	https://doi.org/10.5281/zenodo.5027501	FIGURES 21 & 22. Astiotrema cyclemysi Siddiqi, 1965. 21. A. cyclemysi, ventral view, redrawn from Siddiqi (1965, fig. 1). 22. A. cyclemysi (Syn. Astiotrema lissemydis Agrawal, 1966), ventral view, redrawn from Agrawal (1966a, fig. 11). Abbreviations: AT, anterior testis; Ce, cecum; CP, cirrus-pouch; EP, excretory pore; EV, excretory vesicle; GP, genital pore; OD, ovarian duct; OS, oral sucker; Ov, ovary; Ph, pharynx; PP, pars prostatica; PT, posterior 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.	FIGURES 21 & 22. Astiotrema cyclemysi Siddiqi, 1965. 21. A. cyclemysi, ventral view, redrawn from Siddiqi (1965, fig. 1). 22. A. cyclemysi (Syn. Astiotrema lissemydis Agrawal, 1966), ventral view, redrawn from Agrawal (1966a, fig. 11). Abbreviations: AT, anterior testis; Ce, cecum; CP, cirrus-pouch; EP, excretory pore; EV, excretory vesicle; GP, genital pore; OD, ovarian duct; OS, oral sucker; Ov, ovary; Ph, pharynx; PP, pars prostatica; PT, posterior 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.	2021-06-23	Karar, Yasser F. M.;Blend, Charles K.;Dronen, Norman O.;Adel, Asmaa		Zenodo	biologists	Karar, Yasser F. M.;Blend, Charles K.;Dronen, Norman O.;Adel, Asmaa			
5046879BFFCEA5144D86FD7A5BDFF9AB.taxon	http://purl.org/dc/dcmitype/StillImage	image/png	https://zenodo.org/record/5027503/files/figure.png	https://doi.org/10.5281/zenodo.5027503	FIGURES 23–25. Intra-specific variations observed in Astiotrema fotedari Dhar, 1977. 23. A. fotedari, ventral view, redrawn from Dhar (1977, fig. 1). 24. A. fotedari, ventral view, redrawn from Dhar (1977, fig. 2). 25. A. fotedari (Syn. Gauhatiana fusiformis Wang, 1981), dorsal view, redrawn from Wang (1981, fig. 7). Abbreviations: AT, anterior testis; Ce, cecum; CP, cirrus-pouch; Eg, eggs; Es, esophagus; GP, genital pore; OS, oral sucker; Ov, ovary; Ph, pharynx; PP, pars prostatica; PT, posterior testis; SV, seminal vesicle; Ut, uterus; VF, vitelline follicle; VS, ventral sucker. Scale bars: Fig. 23 = 500 µm; Fig. 24 = 500 µm; Fig. 25 = 500 µm.	FIGURES 23–25. Intra-specific variations observed in Astiotrema fotedari Dhar, 1977. 23. A. fotedari, ventral view, redrawn from Dhar (1977, fig. 1). 24. A. fotedari, ventral view, redrawn from Dhar (1977, fig. 2). 25. A. fotedari (Syn. Gauhatiana fusiformis Wang, 1981), dorsal view, redrawn from Wang (1981, fig. 7). Abbreviations: AT, anterior testis; Ce, cecum; CP, cirrus-pouch; Eg, eggs; Es, esophagus; GP, genital pore; OS, oral sucker; Ov, ovary; Ph, pharynx; PP, pars prostatica; PT, posterior testis; SV, seminal vesicle; Ut, uterus; VF, vitelline follicle; VS, ventral sucker. Scale bars: Fig. 23 = 500 µm; Fig. 24 = 500 µm; Fig. 25 = 500 µm.	2021-06-23	Karar, Yasser F. M.;Blend, Charles K.;Dronen, Norman O.;Adel, Asmaa		Zenodo	biologists	Karar, Yasser F. M.;Blend, Charles K.;Dronen, Norman O.;Adel, Asmaa			
5046879BFFCEA5174D86F9A05B4BFE5D.taxon	http://purl.org/dc/dcmitype/StillImage	image/png	https://zenodo.org/record/5027505/files/figure.png	https://doi.org/10.5281/zenodo.5027505	FIGURES 26 & 27. Astiotrema karachiensis Bilqees, Khatoon & Khan, 2002 n. comb. 26. A. karachiensis, dorsal view, redrawn from Bilqees et al. (2002, fig. 1). 27. A. karachiensis, ventral view, redrawn from Bilqees et al. (2002, fig. 3). Abbreviations: AT, anterior testis; Ce, cecum; CP, cirrus-pouch; Es, esophagus; GP, genital pore; OS, oral sucker; Ov, ovary; Ph, pharynx; PP, pars prostatica; PT, posterior testis; SR, seminal receptacle; SV, seminal vesicle; Ut, uterus; VF, vitelline follicle; VS, ventral sucker. Scale bars: Fig. 26 = 500 µm; Fig. 27 = 500 µm.	FIGURES 26 & 27. Astiotrema karachiensis Bilqees, Khatoon & Khan, 2002 n. comb. 26. A. karachiensis, dorsal view, redrawn from Bilqees et al. (2002, fig. 1). 27. A. karachiensis, ventral view, redrawn from Bilqees et al. (2002, fig. 3). Abbreviations: AT, anterior testis; Ce, cecum; CP, cirrus-pouch; Es, esophagus; GP, genital pore; OS, oral sucker; Ov, ovary; Ph, pharynx; PP, pars prostatica; PT, posterior testis; SR, seminal receptacle; SV, seminal vesicle; Ut, uterus; VF, vitelline follicle; VS, ventral sucker. Scale bars: Fig. 26 = 500 µm; Fig. 27 = 500 µm.	2021-06-23	Karar, Yasser F. M.;Blend, Charles K.;Dronen, Norman O.;Adel, Asmaa		Zenodo	biologists	Karar, Yasser F. M.;Blend, Charles K.;Dronen, Norman O.;Adel, Asmaa			
5046879BFFCCA5194D86F8F85AFFFD08.taxon	http://purl.org/dc/dcmitype/StillImage	image/png	https://zenodo.org/record/5027493/files/figure.png	https://doi.org/10.5281/zenodo.5027493	FIGURES 12–14. Astiotrema ranarum (Mehra & Negi, 1926) Fotedar, 1971 revealing some slight intra-specific variations. 12. A. ranarum (Syn. Centrovitus pentadelphi Bhalerao, 1926), dorsal view, redrawn from Bhalerao (1926, fig. 1). 13. A. ranarum (Syn. Tremiorchis ranarum Mehra & Negi, 1926), dorsal view, redrawn from Mehra & Negi (1926, fig. 2). 14. A. ranarum (Syn. Tremiorchis mehrai Rai, 1962), dorsal view, redrawn from Rai (1962, p. 382).Abbreviations: AT, anterior testis; Ce, cecum; Ci, cirrus; CP, cirrus-pouch; ED, ejaculatory duct; EP, excretory pore; Es, esophagus; EV, excretory vesicle; GP, genital pore; MG, Mehlis’ gland; OS, oral sucker; Ov, ovary; Ph, pharynx; PP, pars prostatica; PT, posterior testis; SR, seminal receptacle; SV, seminal vesicle; Ut, uterus; VD, vitelline duct; VF, vitelline follicle; VR, vitelline reservoir; VS, ventral sucker. Scale bars: Fig. 12 = 500 µm; Fig. 13 = 500 µm; Fig. 14 = 500 µm.	FIGURES 12–14. Astiotrema ranarum (Mehra & Negi, 1926) Fotedar, 1971 revealing some slight intra-specific variations. 12. A. ranarum (Syn. Centrovitus pentadelphi Bhalerao, 1926), dorsal view, redrawn from Bhalerao (1926, fig. 1). 13. A. ranarum (Syn. Tremiorchis ranarum Mehra & Negi, 1926), dorsal view, redrawn from Mehra & Negi (1926, fig. 2). 14. A. ranarum (Syn. Tremiorchis mehrai Rai, 1962), dorsal view, redrawn from Rai (1962, p. 382).Abbreviations: AT, anterior testis; Ce, cecum; Ci, cirrus; CP, cirrus-pouch; ED, ejaculatory duct; EP, excretory pore; Es, esophagus; EV, excretory vesicle; GP, genital pore; MG, Mehlis’ gland; OS, oral sucker; Ov, ovary; Ph, pharynx; PP, pars prostatica; PT, posterior testis; SR, seminal receptacle; SV, seminal vesicle; Ut, uterus; VD, vitelline duct; VF, vitelline follicle; VR, vitelline reservoir; VS, ventral sucker. Scale bars: Fig. 12 = 500 µm; Fig. 13 = 500 µm; Fig. 14 = 500 µm.	2021-06-23	Karar, Yasser F. M.;Blend, Charles K.;Dronen, Norman O.;Adel, Asmaa		Zenodo	biologists	Karar, Yasser F. M.;Blend, Charles K.;Dronen, Norman O.;Adel, Asmaa			
5046879BFFCCA5194D86F8F85AFFFD08.taxon	http://purl.org/dc/dcmitype/StillImage	image/png	https://zenodo.org/record/5027487/files/figure.png	https://doi.org/10.5281/zenodo.5027487	FIGURES 6–8. Intra-specific variations observed in Astiotrema impletum (Looss, 1899) Looss, 1900. 6. A. impletum (Syn. Astiotrema varanum [Verma, 1930] Mukherjee & Ghosh, 1970), dorsal view, redrawn from Verma (1930, fig. B). 7. A. impletum, dorsal view, redrawn from El-Naffar et al. (1984, fig. 2a). 8. A. impletum (Syn. Astiotrema sudarshani Mukherjee & Ghosh, 1970), ventral view, redrawn from Mukherjee & Ghosh (1970, fig. 1). Abbreviations: AT, anterior testis; Ce, cecum; CP, cirrus-pouch; EA, excretory arm; EP, excretory pore; Es, esophagus; EV, excretory vesicle; GP, genital pore; OS, oral sucker; Ov, ovary; Ph, pharynx; PP, pars prostatica; PT, posterior testis; SR, seminal receptacle; SV, seminal vesicle; Ut, uterus; VF, vitelline follicle; VS, ventral sucker. Scale bars: Fig. 6 = 500 µm; Fig. 7 = 1,000 µm; Fig. 8 = 500 µm.	FIGURES 6–8. Intra-specific variations observed in Astiotrema impletum (Looss, 1899) Looss, 1900. 6. A. impletum (Syn. Astiotrema varanum [Verma, 1930] Mukherjee & Ghosh, 1970), dorsal view, redrawn from Verma (1930, fig. B). 7. A. impletum, dorsal view, redrawn from El-Naffar et al. (1984, fig. 2a). 8. A. impletum (Syn. Astiotrema sudarshani Mukherjee & Ghosh, 1970), ventral view, redrawn from Mukherjee & Ghosh (1970, fig. 1). Abbreviations: AT, anterior testis; Ce, cecum; CP, cirrus-pouch; EA, excretory arm; EP, excretory pore; Es, esophagus; EV, excretory vesicle; GP, genital pore; OS, oral sucker; Ov, ovary; Ph, pharynx; PP, pars prostatica; PT, posterior testis; SR, seminal receptacle; SV, seminal vesicle; Ut, uterus; VF, vitelline follicle; VS, ventral sucker. Scale bars: Fig. 6 = 500 µm; Fig. 7 = 1,000 µm; Fig. 8 = 500 µm.	2021-06-23	Karar, Yasser F. M.;Blend, Charles K.;Dronen, Norman O.;Adel, Asmaa		Zenodo	biologists	Karar, Yasser F. M.;Blend, Charles K.;Dronen, Norman O.;Adel, Asmaa			
5046879BFFCCA5194D86F8F85AFFFD08.taxon	http://purl.org/dc/dcmitype/StillImage	image/png	https://zenodo.org/record/5027491/files/figure.png	https://doi.org/10.5281/zenodo.5027491	FIGURES 9–11. Intra-specific variations observed in Astiotrema impletum (Looss, 1899) Looss, 1900 from the present study. 9. Voucher specimen of A. impletum, ventral view. 10. Voucher specimen of A. impletum, ventral view. 11. Voucher specimen of A. impletum, dorsal view.Abbreviations:AT, anterior testis; Ce, cecum; CP, cirrus-pouch; EP, excretory pore; Es, esophagus; GP, genital pore; MG, Mehlis’ gland; OD, ovarian duct; OS, oral sucker; Ov, ovary; Ph, pharynx; PP, pars prostatica; PT, posterior testis; SR, seminal receptacle; SV, seminal vesicle; Ut, uterus; VF, vitelline follicle; VS, ventral sucker. Scale bars: Fig. 9 = 500 µm; Fig. 10 = 500 µm; Fig. 11 = 500 µm.	FIGURES 9–11. Intra-specific variations observed in Astiotrema impletum (Looss, 1899) Looss, 1900 from the present study. 9. Voucher specimen of A. impletum, ventral view. 10. Voucher specimen of A. impletum, ventral view. 11. Voucher specimen of A. impletum, dorsal view.Abbreviations:AT, anterior testis; Ce, cecum; CP, cirrus-pouch; EP, excretory pore; Es, esophagus; GP, genital pore; MG, Mehlis’ gland; OD, ovarian duct; OS, oral sucker; Ov, ovary; Ph, pharynx; PP, pars prostatica; PT, posterior testis; SR, seminal receptacle; SV, seminal vesicle; Ut, uterus; VF, vitelline follicle; VS, ventral sucker. Scale bars: Fig. 9 = 500 µm; Fig. 10 = 500 µm; Fig. 11 = 500 µm.	2021-06-23	Karar, Yasser F. M.;Blend, Charles K.;Dronen, Norman O.;Adel, Asmaa		Zenodo	biologists	Karar, Yasser F. M.;Blend, Charles K.;Dronen, Norman O.;Adel, Asmaa			
5046879BFFCCA5194D86F8F85AFFFD08.taxon	http://purl.org/dc/dcmitype/StillImage	image/png	https://zenodo.org/record/5027505/files/figure.png	https://doi.org/10.5281/zenodo.5027505	FIGURES 26 & 27. Astiotrema karachiensis Bilqees, Khatoon & Khan, 2002 n. comb. 26. A. karachiensis, dorsal view, redrawn from Bilqees et al. (2002, fig. 1). 27. A. karachiensis, ventral view, redrawn from Bilqees et al. (2002, fig. 3). Abbreviations: AT, anterior testis; Ce, cecum; CP, cirrus-pouch; Es, esophagus; GP, genital pore; OS, oral sucker; Ov, ovary; Ph, pharynx; PP, pars prostatica; PT, posterior testis; SR, seminal receptacle; SV, seminal vesicle; Ut, uterus; VF, vitelline follicle; VS, ventral sucker. Scale bars: Fig. 26 = 500 µm; Fig. 27 = 500 µm.	FIGURES 26 & 27. Astiotrema karachiensis Bilqees, Khatoon & Khan, 2002 n. comb. 26. A. karachiensis, dorsal view, redrawn from Bilqees et al. (2002, fig. 1). 27. A. karachiensis, ventral view, redrawn from Bilqees et al. (2002, fig. 3). Abbreviations: AT, anterior testis; Ce, cecum; CP, cirrus-pouch; Es, esophagus; GP, genital pore; OS, oral sucker; Ov, ovary; Ph, pharynx; PP, pars prostatica; PT, posterior testis; SR, seminal receptacle; SV, seminal vesicle; Ut, uterus; VF, vitelline follicle; VS, ventral sucker. Scale bars: Fig. 26 = 500 µm; Fig. 27 = 500 µm.	2021-06-23	Karar, Yasser F. M.;Blend, Charles K.;Dronen, Norman O.;Adel, Asmaa		Zenodo	biologists	Karar, Yasser F. M.;Blend, Charles K.;Dronen, Norman O.;Adel, Asmaa			
5046879BFFCCA5194D86F8F85AFFFD08.taxon	http://purl.org/dc/dcmitype/StillImage	image/png	https://zenodo.org/record/5027499/files/figure.png	https://doi.org/10.5281/zenodo.5027499	FIGURES 17–20. Intra-specific variations observed in Astiotrema odhneri Bhalerao, 1936. 17. A. odhneri (Syn. Astiotrema reniferum of Odhner, 1911 nec Looss, 1898), ventral view, redrawn from Yeh & Fotedar (1958, fig. 5) after Odhner (1911). 18. A. odhneri (Syn. Astiotrema hanumantharai Dhanumkumari, 1999), ventral view, redrawn from Dhanumkumari (1999, fig. 1). 19. A. odhneri (Syn. Astiotrema nathi Gupta, 1954), ventral view, redrawn from Gupta (1954, fig. 1). 20. A. odhneri (Syn. Astiotrema sudanensis Khalil, 1959), dorsal view, redrawn from Khalil (1954, fig. 1). Abbreviations: AT, anterior testis; Ce, cecum; CP, cirrus-pouch; Es, esophagus; GP, genital pore; MG, Mehlis’ gland; Oo, oötype; 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, vasdeferens; VF, vitelline follicle; VS, ventral sucker. Scale bars: Fig. 17 = 1,000 µm; Fig. 18 = 1,000 µm; Fig. 19 = 500 µm; Fig. 20 = 500 µm.	FIGURES 17–20. Intra-specific variations observed in Astiotrema odhneri Bhalerao, 1936. 17. A. odhneri (Syn. Astiotrema reniferum of Odhner, 1911 nec Looss, 1898), ventral view, redrawn from Yeh & Fotedar (1958, fig. 5) after Odhner (1911). 18. A. odhneri (Syn. Astiotrema hanumantharai Dhanumkumari, 1999), ventral view, redrawn from Dhanumkumari (1999, fig. 1). 19. A. odhneri (Syn. Astiotrema nathi Gupta, 1954), ventral view, redrawn from Gupta (1954, fig. 1). 20. A. odhneri (Syn. Astiotrema sudanensis Khalil, 1959), dorsal view, redrawn from Khalil (1954, fig. 1). Abbreviations: AT, anterior testis; Ce, cecum; CP, cirrus-pouch; Es, esophagus; GP, genital pore; MG, Mehlis’ gland; Oo, oötype; 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, vasdeferens; VF, vitelline follicle; VS, ventral sucker. Scale bars: Fig. 17 = 1,000 µm; Fig. 18 = 1,000 µm; Fig. 19 = 500 µm; Fig. 20 = 500 µm.	2021-06-23	Karar, Yasser F. M.;Blend, Charles K.;Dronen, Norman O.;Adel, Asmaa		Zenodo	biologists	Karar, Yasser F. M.;Blend, Charles K.;Dronen, Norman O.;Adel, Asmaa			
5046879BFFCCA5194D86F8F85AFFFD08.taxon	http://purl.org/dc/dcmitype/StillImage	image/png	https://zenodo.org/record/5027503/files/figure.png	https://doi.org/10.5281/zenodo.5027503	FIGURES 23–25. Intra-specific variations observed in Astiotrema fotedari Dhar, 1977. 23. A. fotedari, ventral view, redrawn from Dhar (1977, fig. 1). 24. A. fotedari, ventral view, redrawn from Dhar (1977, fig. 2). 25. A. fotedari (Syn. Gauhatiana fusiformis Wang, 1981), dorsal view, redrawn from Wang (1981, fig. 7). Abbreviations: AT, anterior testis; Ce, cecum; CP, cirrus-pouch; Eg, eggs; Es, esophagus; GP, genital pore; OS, oral sucker; Ov, ovary; Ph, pharynx; PP, pars prostatica; PT, posterior testis; SV, seminal vesicle; Ut, uterus; VF, vitelline follicle; VS, ventral sucker. Scale bars: Fig. 23 = 500 µm; Fig. 24 = 500 µm; Fig. 25 = 500 µm.	FIGURES 23–25. Intra-specific variations observed in Astiotrema fotedari Dhar, 1977. 23. A. fotedari, ventral view, redrawn from Dhar (1977, fig. 1). 24. A. fotedari, ventral view, redrawn from Dhar (1977, fig. 2). 25. A. fotedari (Syn. Gauhatiana fusiformis Wang, 1981), dorsal view, redrawn from Wang (1981, fig. 7). Abbreviations: AT, anterior testis; Ce, cecum; CP, cirrus-pouch; Eg, eggs; Es, esophagus; GP, genital pore; OS, oral sucker; Ov, ovary; Ph, pharynx; PP, pars prostatica; PT, posterior testis; SV, seminal vesicle; Ut, uterus; VF, vitelline follicle; VS, ventral sucker. Scale bars: Fig. 23 = 500 µm; Fig. 24 = 500 µm; Fig. 25 = 500 µm.	2021-06-23	Karar, Yasser F. M.;Blend, Charles K.;Dronen, Norman O.;Adel, Asmaa		Zenodo	biologists	Karar, Yasser F. M.;Blend, Charles K.;Dronen, Norman O.;Adel, Asmaa			
5046879BFFCCA5194D86F8F85AFFFD08.taxon	http://purl.org/dc/dcmitype/StillImage	image/png	https://zenodo.org/record/5027501/files/figure.png	https://doi.org/10.5281/zenodo.5027501	FIGURES 21 & 22. Astiotrema cyclemysi Siddiqi, 1965. 21. A. cyclemysi, ventral view, redrawn from Siddiqi (1965, fig. 1). 22. A. cyclemysi (Syn. Astiotrema lissemydis Agrawal, 1966), ventral view, redrawn from Agrawal (1966a, fig. 11). Abbreviations: AT, anterior testis; Ce, cecum; CP, cirrus-pouch; EP, excretory pore; EV, excretory vesicle; GP, genital pore; OD, ovarian duct; OS, oral sucker; Ov, ovary; Ph, pharynx; PP, pars prostatica; PT, posterior 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.	FIGURES 21 & 22. Astiotrema cyclemysi Siddiqi, 1965. 21. A. cyclemysi, ventral view, redrawn from Siddiqi (1965, fig. 1). 22. A. cyclemysi (Syn. Astiotrema lissemydis Agrawal, 1966), ventral view, redrawn from Agrawal (1966a, fig. 11). Abbreviations: AT, anterior testis; Ce, cecum; CP, cirrus-pouch; EP, excretory pore; EV, excretory vesicle; GP, genital pore; OD, ovarian duct; OS, oral sucker; Ov, ovary; Ph, pharynx; PP, pars prostatica; PT, posterior 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.	2021-06-23	Karar, Yasser F. M.;Blend, Charles K.;Dronen, Norman O.;Adel, Asmaa		Zenodo	biologists	Karar, Yasser F. M.;Blend, Charles K.;Dronen, Norman O.;Adel, Asmaa			
5046879BFFCCA5194D86F8F85AFFFD08.taxon	http://purl.org/dc/dcmitype/StillImage	image/png	https://zenodo.org/record/5027484/files/figure.png	https://doi.org/10.5281/zenodo.5027484	FIGURES 1–5. Astiotrema reniferum (Looss, 1898) Looss, 1900 revealing some intra-specific variations in esophagus extension, vitellarium distribution and maturation, testes configuration, and ovary shape. 1. A. reniferum (Syn. Distomum unicum Looss, 1896 nec Molin, 1859), ventral view, redrawn from Looss (1896, fig. 20). 2. A. reniferum (Syn. Astiotrema giganticum Tiwari, 1958), dorsal view, redrawn from Tiwari (1958, fig. 1). 3. A. reniferum (Syn. Astiotrema thapari Gupta, 1954), ventral view, redrawn from Gupta (1954, fig. 4). 4. A. reniferum (Syn. Astiotrema loossii Mehra, 1931), dorsal view, redrawn from Mehra (1931b, p. 187). 5. A. reniferum (Syn. A. loossii), ventral view, redrawn from Dwivedi (1966, fig. 2). Abbreviations: AT, anterior testis; Ce, cecum; CP, cirrus-pouch; Eg, eggs; EP, excretory pore; Es, esophagus; EV, excretory vesicle; GP, genital pore; LC, Laurel’s canal; Oo, oötype; 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; VS, ventral sucker. Scale bars: Fig. 1 = 1,000 µm; Fig. 2 = 2,000 µm; Fig. 3 =2,000 µm; Fig. 4 = 500 µm; Fig. 5 = 1,000 µm.	FIGURES 1–5. Astiotrema reniferum (Looss, 1898) Looss, 1900 revealing some intra-specific variations in esophagus extension, vitellarium distribution and maturation, testes configuration, and ovary shape. 1. A. reniferum (Syn. Distomum unicum Looss, 1896 nec Molin, 1859), ventral view, redrawn from Looss (1896, fig. 20). 2. A. reniferum (Syn. Astiotrema giganticum Tiwari, 1958), dorsal view, redrawn from Tiwari (1958, fig. 1). 3. A. reniferum (Syn. Astiotrema thapari Gupta, 1954), ventral view, redrawn from Gupta (1954, fig. 4). 4. A. reniferum (Syn. Astiotrema loossii Mehra, 1931), dorsal view, redrawn from Mehra (1931b, p. 187). 5. A. reniferum (Syn. A. loossii), ventral view, redrawn from Dwivedi (1966, fig. 2). Abbreviations: AT, anterior testis; Ce, cecum; CP, cirrus-pouch; Eg, eggs; EP, excretory pore; Es, esophagus; EV, excretory vesicle; GP, genital pore; LC, Laurel’s canal; Oo, oötype; 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; VS, ventral sucker. Scale bars: Fig. 1 = 1,000 µm; Fig. 2 = 2,000 µm; Fig. 3 =2,000 µm; Fig. 4 = 500 µm; Fig. 5 = 1,000 µm.	2021-06-23	Karar, Yasser F. M.;Blend, Charles K.;Dronen, Norman O.;Adel, Asmaa		Zenodo	biologists	Karar, Yasser F. M.;Blend, Charles K.;Dronen, Norman O.;Adel, Asmaa			
5046879BFFCCA5194D86F8F85AFFFD08.taxon	http://purl.org/dc/dcmitype/StillImage	image/png	https://zenodo.org/record/5027497/files/figure.png	https://doi.org/10.5281/zenodo.5027497	FIGURES 15 & 16. Intra-specific variations observed in Astiotrema emydis Ejsmont, 1930. 15. A. emydis, dorsal view, redrawn from Ejsmont (1930, fig. 1). 16. A. emydis, ventral view, redrawn from Modrzejewska (1938, fig. 1). Abbreviations:AT, anterior testis; Ce, cecum; CP, cirrus-pouch; EP, excretory pore; Es, esophagus; EV, excretory vesicle; GP, genital pore; OD, ovarian duct; OS, oral sucker; Ov, ovary; P.Ph, prepharynx; 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. 15 = 500 µm; Fig. 16 = 500 µm.	FIGURES 15 & 16. Intra-specific variations observed in Astiotrema emydis Ejsmont, 1930. 15. A. emydis, dorsal view, redrawn from Ejsmont (1930, fig. 1). 16. A. emydis, ventral view, redrawn from Modrzejewska (1938, fig. 1). Abbreviations:AT, anterior testis; Ce, cecum; CP, cirrus-pouch; EP, excretory pore; Es, esophagus; EV, excretory vesicle; GP, genital pore; OD, ovarian duct; OS, oral sucker; Ov, ovary; P.Ph, prepharynx; 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. 15 = 500 µm; Fig. 16 = 500 µm.	2021-06-23	Karar, Yasser F. M.;Blend, Charles K.;Dronen, Norman O.;Adel, Asmaa		Zenodo	biologists	Karar, Yasser F. M.;Blend, Charles K.;Dronen, Norman O.;Adel, Asmaa			
