Fig. 1 in Bivaginogyrus obscurus (Monogenea: Dactylogyridae), a Gill Parasite of Two Cyprinids Pseudorasbora pumila pumila and Pseudorasbora parva, New to Japan

Fig. 1. Measurement axes of hard parts of Bivaginogyrus obscurus (Gussev, 1955). A, anchor; B, bar; C, hook; D, copulatory organ. Abbreviations: al, accessory piece length; atl, anchor total length; bmw, bar median width; btl, bar total length; btw, bar total width; cl, copulatory organ length; hl, hook length; pl, point length; rl, root length; sl, shaft length.