Ascarophis filiformis Polyanski 1952
Creators: name: Arai, Hisao P.
name: Smith, John W.
Publisher: name: Zenodo
Year: 2016
Subjects: Biodiversity
Taxonomy
Animalia
Nematoda
Secernentea
Spirurida
Spiruridae
Ascarophis
Ascarophis filiformis

description: Ascarophis filiformis Polyanski, 1952
Description (after Appy 1981). With characteristics of the genus.
Males: 12.4 (9.0–14.7) long, 0.105 (0.077–0.130) wide at vas deferens. Muscular oesophagus 0.343 (0.260– 0.403) and glandular oesophagus 2.117 (1.445–2.864) long. Deirids, nerve ring and excretory pore 0.175 (0.140– 0.209), 0.219 (0.185–0.258) and 0.325 (0.264–0.367), respectively, from anterior end (Fig. 54 A). Tail 0.158 (0.125–0.189) long. Right spicule 0.109 (0.094–0.129) long, spicule arcuate, notched distally. Left spicule 0.328 (0.271–0.392) long, tubular, divided into proximal shaft and blade. Ratio of left to right 1:3.0 (1:2.5 to 1:3.5). Area rugosa with about 11 longitudinal rows of cuticular elevations. 10 pairs caudal papillae: two double pairs precloacal, six pairs post-cloacal; 5th post-cloacal pair relatively small, ventral to 6th pair. Caudal alae narrow. Phasmids behind last pair post-cloacal papillae (Fig. 54 B).
Females: 25.1 (19.3–35.9) long, 0.160 (0.112–0.207) wide at vulva. Muscular oesophagus 0.386 (0.330–0.462) and glandular oesophagus 2.606 (1.845–3.424) long. Deirids, nerve ring, excretory pore and vulva 0.186 (0.143– 0.228), 0.228 (0.179–0.265), 0.340 (0.258–0.415) and 12.7 (9.5–18.3), respectively, from anterior end. Tail 0.090 (0.058–0.120) long (Fig. 54 C). Eggs 0.047 (0.042–0.050) x 0.031 (0.028–0.035) with two filaments arising from prominent knob at one pole (Fig. 54 D).
[For comments on A. filiformis see page 90–91]
Site: stomach
Hosts: Boreogadus saida (9); Gadus morhua (1, 2, 3, 4); Hippoglossus stenolepis (7, 8); Liparis dennyi (5); Reinhardtius hippoglossoides (6)
Distribution: Atlantic, Nunavut, Pacific
Records: 1. Redkozubova 1976 (AT); 2. Linkletter et al. 1977 (AT); 3. Appy 1981 (AT); 4. Appy & Burt 1982 (AT); 5. Ko 1986 (PA); 6. Arthur & Albert 1994 (AT); 7. Blaycock 1996 (PA); 8. Blaycock et al. 1998a (PA); Køie 2009 (NU)
Ascarophis morrhuae van Beneden, 1871
Description (after Ko 1986). With characteristics of the genus.
Males: 5.9 (5.1–7.2) long, 0.028 (0.026–0.029) wide at nerve ring. Buccal cavity 0.097 (0.086–0.108) long (Fig. 55 A). Muscular oesophagus 0.271 (0.226–0.297) and glandular oesophagus 1.75 (1.34–2.43) long. Nerve ring 0.134 and excretory pore 0.242 from anterior end. Four pairs pre-cloacal, and six pairs post-cloacal papillae. Left spicule 0.765 (0.740–0.790), right spicule 0.098 (0.095–0.100) long (Fig. 55 B). Tail 0.105 (0.084–0.134) long.
Females: 10.8 (8.5–12.7) long, 0.036 (0.031–0.041) wide at nerve ring. Buccal cavity 0.098 (0.085–0.115) long. Muscular oesophagus 0.246 (0.216–0.288) and glandular oesophagus 1.9 (1.1–2.3) long. Nerve ring 0.140 (0.113–0.178) and excretory pore 0.212 (0.161–0.240) from anterior end. Vulva 5.3 (4.7–6.0) from posterior end. Uterus extends from region of glandular oesophagus almost to tail tip. Tail 0.116 (0.072–0.146) long with knoblike tip (Fig. 55 C). Embryonated eggs 0.036 (0.026–0.046) x 0.024 (0.022–0.026) with one polar plug bearing two filaments although, according to Ko (1986), eggs in the posterior extension of the uterus apparently lack filaments (Fig. 55 C).
[For comments on A. morrhuae see below]
Site: alimentary tract
Hosts: Alosa sapidissima (4); Anarhichas lupus (3); Gadus morhua (2); Gasterosteus aculeatus (1);
Glyptocephalus cynoglossus (3)
Distribution: Atlantic, Labrador, Newfoundland
Records: 1. Hanek & Threlfall 1970a (AT, LB, NL); 2. Gaevskaya & Umnova 1977 (AT); 3. Zubchenko 1980 (AT);
4. Hogans et al. 1993 (AT)
description: Published as part of Arai, Hisao P. & Smith, John W., 2016, Guide to the Parasites of Fishes of Canada Part V: Nematoda, pp. 1-274 in Zootaxa 4185 (1) on pages 86-90, DOI: 10.11646/zootaxa.4185.1.1, http://zenodo.org/record/165530