Fig. 13. Ascarophis arctica Polyanskiy, 1952 from Gasterosteus aculeatus Linnaeus, scanning electron micrographs. A–C in Rhabdochona angusticaudata sp. n. (Nematoda: Rhabdochonidae) from the Japanese eel Anguilla japonica, and new records of some other nematodes from inland fishes in Japan

Fig. 13. Ascarophis arctica Polyanskiy, 1952 from Gasterosteus aculeatus Linnaeus, scanning electron micrographs. A–C – cephalic end of female, lateral, apical and dorsoventral views, respectively; D – region of female mouth (another specimen), sublateral view; E – tail of female, ventral view; F – deirid; G – distal end of left spicule, ventral view. Abbreviations: a – amphid; b – cephalic papilla c – phasmid; d – anus; l – labium; p – pseudolabium with anterior tooth-like projection; s – sublabium.