Figure 1
Photomicrographs of a-c: Urotrema scabridum; ventral view (a) Whole mount preparation, Bar 100µm; (b) Terminal part of the worm, Bar 20µm; (c) Ventral sucker, Bar 20µm; d, e: Renschetrema indicum ventral view (d) Whole mount, Bar 100µm; (e) oral sucker and the mouth opening, Bar 50µm. OS, oral sucker; MO, mouth opening; PH, pharynx; IN, intestine; VS, ventral sucker; UT, uterus; OV, ovary; EG, eggs; AT, anterior testis; PT, posterior testis; VT, vitellaria, T, testis.
Figure 2
Scanning electron micrograph showing the surface topography of Urotrema scabridum . (a) Whole ventral view. OS, oral sucker; VS, ventral sucker, Bar 5µm; (b) The terminal oral sucker with slit like mouth (MO) surrounded by papillae (arrow), Bar 20µm; (c) type I dome like papillae (arrows) surrounding mouth, Bar 10µm; (d) ventral sucker, the lip of this sucker was wrinkled and covered with tegument spines and few scattered papillae (arrows), magnified at the inset (arrows), Bar 10µm; (e) Tongue-shaped tegument spines below the level of the oral sucker, Bar 10µm; (f) Tegument between oral sucker and the ventral pit covered with pointed tip spines, Bar 5µm.
Figure 3
Urotrema scabridum; holotype ventral view; OS, oral sucker; MO, mouth opening; PH, pharynx; IN, intestine; VS, ventral sucker; OV, ovary; UT, uterus; AT, anterior testis; PT, posterior testis; GP, genital pore; SV, seminal vesicle; CP, cirrus pouch; VT, vitellaria; EP, excretory pore, IN, intestine, Bar 100µm.
Figure 4
Scanning electron micrograph showing the surface topography of Renschetrema indicum. (a) Whole ventral view; OS, oral sucker; MO, mouth opening; VS, ventral sucker; R, cytoplasmic ridges, Bar 20µm; (b) The anterior half of the worm, oral sucker includes the mouth opening which is directed anterioventrally and surrounded by papillae, the ventral sucker is pre-equatorial, VP ventral pit; S tegument spines, Bar 5µm; (c) Terminal portion of the body showing the oral sucker with two circles of papillae (arrows) surrounding the mouth opening, Bar 10µm; (d) Tegument ridges equipped with rows of spines with pointed tip, Bar 10µm; (e) The posterior extremity, devoid of spines, with the sub-terminal excretory pore (EP), Bar 10µm.
Figure 5
Renschetrema indicum; holotype ventral view; OS, oral sucker; MO, mouth opening; PH, pharynx; E, esophagus; VS, ventral sucker; OV, ovary; UT, uterus; EG, eggs; T, testis; GP, genital pore; SV, seminal vesicle; CP, cirrus pouch; VT, vitellaria; EP, excretory pore, Bar 50µm.
Figure 4
Scanning electron micrograph showing the surface topography of Renschetrema indicum. (a) Whole ventral view; OS, oral sucker; MO, mouth opening; VS, ventral sucker; R, cytoplasmic ridges, Bar 20µm; (b) The anterior half of the worm, oral sucker includes the mouth opening which is directed anterioventrally and surrounded by papillae, the ventral sucker is pre-equatorial, VP ventral pit; S tegument spines, Bar 5µm; (c) Terminal portion of the body showing the oral sucker with two circles of papillae (arrows) surrounding the mouth opening, Bar 10µm; (d) Tegument ridges equipped with rows of spines with pointed tip, Bar 10µm; (e) The posterior extremity, devoid of spines, with the sub-terminal excretory pore (EP), Bar 10µm.
Figure 5
Renschetrema indicum; holotype ventral view; OS, oral sucker; MO, mouth opening; PH, pharynx; E, esophagus; VS, ventral sucker; OV, ovary; UT, uterus; EG, eggs; T, testis; GP, genital pore; SV, seminal vesicle; CP, cirrus pouch; VT, vitellaria; EP, excretory pore, Bar 50µm.