Guide to the Parasites of Fishes of Canada Part V: Nematoda
Author
Arai, Hisao P.
Author
Smith, John W.
text
Zootaxa
2016
4185
1
1
274
journal article
37874
10.11646/zootaxa.4185.1.1
11620862-ddcf-4c01-b0d9-32867e03d74b
1175-5326
165530
0D054EDD-9CDC-4D16-A8B2-F1EBBDAD6E09
Ascarophis extalicola
Appy, 1981
Description (after
Appy 1981
). With characteristics of the genus.
Males: 5.3 (4.0–6.3) long, 0.039 (0.033–0.051) wide at
vas deferens
. Muscular oesophagus 0.184 (0.159– 0.224) and glandular oesophagus 1.018 (0.732–1.269) long. Deirids, nerve ring and excretory pore 0.113 (0.097– 0.127), 0.134 (0.116–0.148) and 0.212 (0.183–0.244), respectively, from anterior end (
Fig. 53
A). Tail 0.098 (0.078–0.117) long. Right spicule 0.070 (0.061–0.083) long, spicule arcuate, notched distally. Left spicule 0.313 (0.276–0.359) long, divided into proximal shaft and blade. Ratio of left to right 1:4.5 (1:3.6 to 1:5.6).
Area rugosa
with about nine longitudinal rows of cuticular elevations. 10 pairs caudal papillae: four pairs pre-cloacal, six pairs post-cloacal; 5th post-cloacal pair relatively small, ventral to 6th pair. Caudal alae narrow. Phasmids behind last pair of post-cloacal papillae (
Fig. 53
B).
Females: 7.2 (5.9–8.7) long, 0.050 (0.037–0.072) wide at vulva. Muscular oesophagus 0.187(0.163–0.202) and glandular oesophagus 1.196 (1.015–1.363) long. Deirids, nerve ring, excretory pore and vulva 0.115 (0.101– 0.128), 0.133 (0.116–0.148), 0.215(0.180–0.237) and 5.2 (4.2–6.2), respectively, from anterior end. Tail 0.052 (0.037–0.066) long (
Fig. 53
C). Eggs 0.044 (0.041–0.046) x 0.027 (0.026–0.031) with two to 11 filaments at one pole (
Fig. 53
D).
[For comments on
A. extalicola
see pages 90–91.]
Sites: intestine, rectum
Hosts:
Gadus morhua
(1, 3);
Melanogrammus aeglefinus
(2);
Myoxocephalus octodecemspinosus
(1) Distribution: Atlantic
Records: 1.
Appy 1981
; 2.
Scott 1981
; 3.
Appy & Burt 1982