Guide to the Parasites of Fishes of Canada Part V: Nematoda Author Arai, Hisao P. Author Smith, John W. text Zootaxa 2016 4185 1 1 274 journal article 10.11646/zootaxa.4185.1.1 11620862-ddcf-4c01-b0d9-32867e03d74b 1175-5326 165530 0D054EDD-9CDC-4D16-A8B2-F1EBBDAD6E09 Philometra kobuleji Molnar & Fernando, 1975 Description (after Molnar & Fernando 1975b ). With characteristics of the genus. Males: minute, transparent, 2.1–3.0 (2.5) long. Cylindrical body tapers slightly at anterior end. Greatest width, 0.056–0.061 (0.059) near tail end. Cuticle smooth and thin. Head rounded, papillae not observed. Mouth simple, with three lips. Oesophagus muscular, slightly swollen near mouth, 0.375– 0.440 (0.418) long ( Fig. 32 A). Tail end blunt, with two prominent lateral papillae connected by inconspicuous membrane. Two spicules, almost equal; right one 0.109–0.134 (0.120), left one 0.106–0.126 (0.115) long. Gubernaculum a bent chitinous plate with spearlike end, 0.065–0.074 (0.072) long ( Fig. 32 B). Anus opens ventrally near posterior end. FIGURE 31. Philometra cylindracea (Ward & Magath, 1917) Van Cleave & Mueller, 1934 . A. male, posterior end; B. female, anterior end; C. female, posterior end. (Redrawn from Molnar & Fernando 1975a) FIGURE 32. Philometra kobuleji Molnar & Fernando, 1975 . A. male, anterior end; B. male, posterior end; C. female, anterior end; D. female, posterior end. (Redrawn from Molnar & Fernando 1975b) Females: mature specimens red in colour, 86–97 (91) long. Body cylindrical, tapering at anterior and posterior ends. Cuticle smooth and thin. Body cavity dominated by uterus packed with larvae, 0.320–0.370 (0.350) long; larvae have rounded anterior end and sharply pointed tail ( Fig. 32 C,D). Head rounded, bearing pair of lateral amphids, and four fleshy papillae in submedian line. Rim of mouth with three lips. Tail tapers at tip, bearing small dorsally directed papilla ( Fig. 32 D). Oesophagus 1.1–1.4 (1.2) long, with bulb near mouth. Oesophageal gland moderately well developed. Nerve ring 0.3 from anterior end ( Fig. 32 C). Intestine ends blindly near tail tip ( Fig. 32 D). Vulva atrophied. Two ovaries joined by common uterine duct. Uteri end near nerve ring and anus ( Fig. 32 C,D). Sites: body cavity, mesenteries, swim bladder Host: Catostomus commersonii Distribution: Ontario Records: Molnar & Fernando 1975b ; Chan 1980 ; Molnar et al. 1982