Cucullanus cirratus Müller, 1777

Arai, Hisao P. & Smith, John W., 2016, Guide to the Parasites of Fishes of Canada Part V: Nematoda, Zootaxa 4185 (1), pp. 1-274 : 160

Cucullanus cirratus Müller, 1777

Description (after Berland 1970). With characteristics of the genus. Head slightly swollen and bent dorsad, with

characteristic two pairs cephalic papillae and one pair amphids. Mouth bordered externally by collarette, bearing

on its inner face many (60 to 70) small teeth on each side. Body widest just behind oesophagus. Excretory pore

about midway between nerve ring and oesophago-intestinal junction. Deirids about midway between excretory

pore and nerve ring ( Fig. 92 A). Cuticle with fine striations throughout body.

Males: 10.4–14.7 long; maximum width 0.26–0.32. Oesophagus 1.33–1.62 long. Nerve ring 0.474–0.586,

deirids 0.744–0.944 and excretory pore 0.960–1.157 from anterior end. Anus to tail tip 0.218–0.296. Cuticle

0.006–0.007 thick. Right spicule 0.915–0.978 long, left one 0.914–1.02 long. Y-shaped gubernaculum 0.160–0.178

long. Pre-cloacal sucker without cuticular rim present. Eleven pairs caudal papillae ( Fig. 92 B). Females: 13.1–20.8 long; maximum width 0.29–0.44. Oesophagus 1.47–1.95 long. Nerve ring 0.525–0.653,

deirids 0.82–1.08, excretory pore 1.02–1.34 and vulva 7.50–11.72 from anterior end. Anus to tail tip 0.460–0.514.

Cuticle 0.005–0.007 thick. Anterior end to vulva 7.50–11.72 ( Fig. 92 C). Eggs 0.075–0.098 x 0.041–0.052.

Sites: intestinal lumen, stomach

Hosts: Gadus morhua (2, 4); Hippoglossus hippoglossus (7); Melanogrammus aeglefinus (1, 3); Pollachius virens (5); Urophycis tenuis (6)

Distribution: Atlantic

Records: 1. Kuitunen-Ekbaum 1937b; 2. Gaevskaya & Umnova 1977; 3. Scott 1981; 4. Appy & Burt 1982; 5. Scott 1985; 6. Scott 1987; 7. Scott & Bray 1989

Figures

FIGURE 92. Cucullanus cirratus Müller, 1777. A. anterior end, lateral view; B. male, posterior end, lateral view; C. female, vulvar region. (Redrawn from Berland 1970)