Fig. 1. Dactylogyrus petruschewskyi Gussev, 1955 in Redescription of Dactylogyrus petruschewskyi Gussev, 1955 (Monogenea: Dactylogyridae), a Newly Recorded Alien Monogenean from an Alien Cyprinid, Megalobrama amblycephala Yih, 1955 (Cypriniformes: Cyprinidae), in Ibaraki Prefecture, Central Japan

Fig. 1. Dactylogyrus petruschewskyi Gussev, 1955. NSMT-Pl 6451. Whole mount (ventral view). Abbreviations: DH, dorsal hamulus; E, eye spot; G, germarium; HG, head gland; HO, head organ; Hp, haptor; In, intestine; MCO, male copulatory organ; MG, Mehlis' gland; MH, marginal hook; O, oötype; Od, oviduct; Ph, pharynx; PR, prostatic reservoir; SR, seminal receptacle; SV, seminal vesicle; T, testis; V, vitellaria; Va, vagina; VD, vas deferens.