Pseudocapillaria (Pseudocapillaria) tomentosa (Dujardin, 1843) Moravec, 1987

Arai, Hisao P. & Smith, John W., 2016, Guide to the Parasites of Fishes of Canada Part V: Nematoda, Zootaxa 4185 (1), pp. 1-274 : 32

Pseudocapillaria (Pseudocapillaria) tomentosa (Dujardin, 1843) Moravec, 1987

Synonyms: Capillaria catostomi Pearse 1934 ; Hepaticola bakeri Mueller & Van Cleave, 1932 (partim); Capillaria bakeri (Mueller & Van Cleave, 1932) Freitas & Lent, 1935 ; Skrjabinocapillaria bakeri (Mueller & Van Cleave, 1932) Skryabin & Schikhobalova, 1954

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

Males: Body length 3.95–7.18, maximum width 0.054–0.068. Muscular oesophagus 0.183–0.330 long. Nerve

ring 0.084–0.099 from anterior end. Spicule smooth, well sclerotized, 0.240–0.330 long ( Fig. 24 A). Tail 0.015–

0.018 long, rounded. Caudal bursa absent ( Fig. 24 B).

Females: Gravid worms 7.30–12.04 long, maximum width 0.068–0.108. Muscular oesophagus 0.258–0.321

long, nerve ring 0.090–0.096 from anterior end. Vulva usually a short distance, 0.030–0.066, behind oesophago–

intestinal junction ( Fig. 24 C). Eggs in one row near vulva, several rows distally. Mature eggs 0.063–0.078 x 0.030–

0.039. Anus subterminal, tail 0.009–0.015 long.

Site: intestine

Hosts: Catostomus catostomus (1, 3); Catostomus commersonii (1, 4, 6, 7, 8); Catostomus macrocheilus (3); Coregonus clupeaformis (8); Cottus asper (3); Couesius plumbeus (3); Cyprinus carpio (8); Cyprinus carpio x Carassius auratus (8); Lota lota (1, 2, 5); Mylocheilus caurinus (3); Oncorhynchus clarkii (3); Oncorhynchus kisutch (3); Oncorhynchus mykiss (3); Prosopium williamsoni (3); Ptychocheilus oregonensis (3); Richardsonius balteatus (3); Salvelinus fontinalis (2, 3); Salvelinus malma (3)

Distribution: British Columbia, Ontario

Records: 1. Bangham 1941 (ON); 2. Bangham & Venard 1946 (ON); 3. Bangham & Adams 1954 (BC); 4. Bangham 1955 (ON); 5. Dechtiar 1972a (ON); 6. Bell & Beverley-Burton 1980 (ON); 7. Moravec 1980 (ON); 8. Bell & Beverley-Burton 1981 (ON)

Figures

FIGURE 24. Pseudocapillaria (Pseudocapillaria) tomentosa (Dujardin, 1843) Moravec, 1987. A. male, posterior end, lateral view; B. male, tail, ventral view; C. female, vulvar region. (Redrawn from Moravec 2001)