Fig. 3. Limnotrachelobdella okae, 61.0 in Limnotrachelobdella okae (Hirudinida: Piscicolidae) Parasitic on Big-scaled Redfin, Pseudaspius hakonensis (Cypriniformes: Leuciscidae), in Two Brackish Water Lakes, Hokkaido, Japan

Fig. 3. Limnotrachelobdella okae, 61.0 mm total length in 70% ethanol. NSMT-An 1879, from big-scaled redfin, Pseudaspius hakonensis, from Lake Tofutsu, Hokkaido, Japan. A, entire body, ventral view; B and C, trachelosome including oral sucker and clitellum, ventral and dorsal views, respectively; D and E, caudal sucker and posterior portion of urosome, ventral and dorsolateral views, respectively; F, Urosome segments including 5th–7th pairs of pulsatile vesicles. Abbreviations: c, clitellum; cs, caudal sucker; eb, everted bursa; mg, male gonopore; os, oral sucker; t, trachelosome; u, urosome; 5pv, 5th pulsatile vesicle; 6pv, 6th pulsatile vesicle; 7pv, 7th pulsatile vesicle. Each position of pulsatile vesicles 1–13 is indicated by an Arabic numeral. Horizontal lines indicate boundaries of urosome segments. Scale bars: A, 10 mm; B, C, 5 mm; D, E, 3 mm; F, 5 mm.