Salvelinema Trofimenko, 1962

Arai, Hisao P. & Smith, John W., 2016, Guide to the Parasites of Fishes of Canada Part V: Nematoda, Zootaxa 4185 (1), pp. 1-274 : 102

Salvelinema Trofimenko, 1962

Synonym: Pseudometabronema Bogdanova, 1963 Generic diagnosis (after Margolis & Kabata 1967, and Hoffman 1999). Cystidicolidae . Body slender, whitish, transparent when living, tapering at both ends. Mouth consists of dorsal and ventral semicircular or oval openings joined by narrow laterally compressed isthmus bounded by two well developed pseudolabia ( Fig. 64 A). Four inconspicuous submedian cephalic papillae present. Buccal cavity divided into an anterior expanded buccal capsule and a posterior slender pharynx which leads to a muscular oesophagus. Males with well developed tail, subventral cuticular alae and special ornamentation. Paired pedunculated pre-cloacal papillae variable in number. Five pairs of post-cloacal papillae present. Left spicule much longer than right one. Gubernaculum absent. Vulva anterior to mid-body region. Eggs thick-shelled with one or two polar plugs bearing filaments, and containing vermiform larvae when fully developed. Young eggs lack both polar plugs and filaments. Parasites of the swim bladder of salmonid fishes.

Figures

FIGURE 64. Salvelinema walkeri (Ekbaum, 1935) Margolis, 1967. A. en face view; B. male, anterior end, lateral view; C. male, posterior end, lateral view; D. gravid female, tail, lateral view; E. mature egg. (A. redrawn from Margolis & Kabata 1967; B. to E. redrawn from Moravec & Nagasawa 1999 b)