Capillaria (Capillaroides) catenata Van Cleave & Mueller, 1932

Arai, Hisao P. & Smith, John W., 2016, Guide to the Parasites of Fishes of Canada Part V: Nematoda, Zootaxa 4185 (1), pp. 1-274 : 26

Capillaria (Capillaroides) catenata Van Cleave & Mueller, 1932

Synonym: Capillaria (Thominx) catenata Van Cleave & Mueller, 1932

Description (after Moravec 2001). With characteristics of the genus.

Males: 7.70–9.04 long, 0.068 maximum width. Entire oesophagus 5.90–6.48 long, 40 stichocytes. Spicule apparently weakly sclerotized, 0.399–0.465 long, covered with transverse grooves except at extremities ( Fig. 20 A). Posterior end rounded, somewhat inflated both sides, with two large ventro-lateral papillae. Cloacal opening subterminal, tail 0.018 long.

Females: Gravid worms 10.98–12.27 long, maximum width 0.068–0.095. Muscular oesophagus 0.210–0.300 long, stichosome 5.60–6.29 long, 40–44 stichocytes. Nerve ring 0.063–0.096 from anterior end. Vulva 0.009–0.090 behind oesophago-intestinal junction, its lips not elevated. Vulvar appendage absent ( Fig. 20 B). Relatively few eggs (ca 10) in uterus, in one row. Eggs 0.057–0.060 x 0.030–0.039 (possibly expanded by coverslip pressure). Site: intestine

Hosts: Ambloplites rupestris (2); Catostomus commersoni (1); Oncorhynchus nerka (3, 4); Osmerus mordax (3, 4) Distribution: Ontario, Quebec

Records: 1. Fantham & Porter 1948 (QC); 2. Dechtiar 1972a (ON); 3. Collins & Dechtiar 1974 (ON); 4. Dechtiar et

al. 1988 (ON)

Figures

FIGURE 20. Capillaria (Capillaroides) catenata Van Cleave & Mueller, 1932. A. male, posterior end with evaginated spicular sheath and protruding spicules; B. female, vulvar region. (Redrawn from Moravec 2001)