Ascarophis
Creators
Description
Ascarophis sp.
Sites: intestinal lumen, stomach
Hosts: Coregonus nasus (8); Cottus aleuticus (5); Gadus macrocephalus (5); Gadus morhua (9); Hexagrammos decagrammus (1, 5); Mallotus villosus (6); Nautichthys oculofasciatus (5); Oncorhynchus gorbuscha (2, 4); Reinhardtius hippoglossoides (7)
Distribution: Atlantic, British Columbia, Newfoundland, Northwest Territories, Pacific
Records: 1. Margolis 1977 (PA); 2. Anon. 1981 (BC); 3. Sankurathri et al. 1983 (PA); 4. Anon. 1984 (BC); 5. Ko 1986 (BC, PA); 6. Arthur et al. 1995 (AT); 7. Boje et al. 1997 (AT); 8. Choudhury & Dick 1997 (NT): 9. Khan et al. 2011 (NF)
Comments: Five Ascarophis species are known currently from Canadian fishes. Appy (1981) provided good
descriptions and illustrations for A. arctica, A. extalicola and A. filiformis; the original descriptions of A. morrhuae
and A. sebastodis are relatively poor. Taxonomic problems concern morphology of the head of both sexes, and the
tails of males. Regarding the head, the pseudolabia of A. extalicola have a blunt knob rather than the prominent conical apex of A. arctica and A. filiformis, so Appy (op. cit.) and Ko (1986) suggested that A. extalicola might be related to “ Cystidicoloides ” [species of which have been transferred to Salmonema; see page 100]. Regarding male tails, an area rugosa, narrow caudal alae, six pairs of post-cloacal papillae, and paired phasmids behind the 6th pair of papillae appear to be diagnostic. Appy (op. cit.) pointed out that papillae of the 5th pair are relatively small and ventral to the 6th pair, so earlier workers might have overlooked them. Indeed, Figure 55 B illustrates an A. morrhuae male, redrawn from Berland (1961), apparently with only five pairs of post-cloacal papillae, and structures that are [sic] “possibly the phasmids”. The description of neither A. morrhuae nor A. sebastodis mentions an area rugosa; there is no reference to paired phasmids for A. sebastodis; and caudal alae are not mentioned in the descriptions for either species, although Figure 55 B illustrates them for A. morrhuae. Both A. morrhuae and A. sebastodis should be redescribed and illustrated with special attention to the morphology of heads and tails.
Notes
Files
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Linked records
Additional details
Identifiers
Biodiversity
- Family
- Spiruridae
- Genus
- Ascarophis
- Kingdom
- Animalia
- Order
- Spirurida
- Phylum
- Nematoda
- Taxon rank
- genus
References
- Sankurathri, C. S., Kabata, Z. & Whitaker, D. J. (1983) Parasites of the Pacific hake, Merluccius productus (Ayres, 1855) in the Strait of Georgia, in 1974 - 1975. Syesis, 16, 5 - 22.
- Anthony, D. D. (1984) Helminth parasites of white bass (Morone chrysops) from Lake Nipissing, Ontario. Program and Abstracts. 59 th Annual Meeting, American Society of Parasitologists, 05 - 09 August 1984. Snowbird, Utah, p. 27.
- Ko, R. C. (1986) A preliminary review of the genus Ascarophis van Beneden, 1871 (Nematoda: Cystidicolidae) of the gastrointestinal tract of fishes. Department of Zoology, University of Hong Kong, Occasional Publications, 54 pp.
- Arthur, J. R., Albert, E. & Boily, F. (1995) Parasites of capelin (Mallotus villosus) in the St. Lawrence estuary and gulf. Canadian Journal of Fisheries and Aquatic Sciences, 52 (Suppl. 1), 246 - 253. http: // dx. doi. org / 10.1139 / f 95 - 532
- Boje, J., Riget, F. & Koie, M. (1997) Helminth parasites as biological tags in population studies of Greenland halibut (Reinhardtius hippoglossoides (Walbaum )), in the north - west Atlantic. ICES Journal of Marine Science, 54, 886 - 895. http: // dx. doi. org / 10.1006 / jmsc. 1997.0214
- Choudhury, A. & Dick, T. A. (1997) Parasites of the broad whitefish from the Mackenzie Delta. In: Tallman, R. F. & Reist, J. D. (Eds.), Proceedings of the Broad Whitefish Workshop: the biology, traditional knowledge and scientific management of broad whitefish (Coregonus nasus (Pallas )) in the lower Mackenzie River: p. 167 - 177. Canadian Technical Report of Fisheries and Aquatic Sciences, No. 2193, xi + 219 pp.
- Khan, R. A., Chandra, C. V. & Earle, P. (2011) Comparison of metazoan parasites of Atlantic cod, Gadus morhua, from three geographical areas of coastal Newfoundland. Journal of Parasitology, 97, 270 - 274. http: // dx. doi. org / 10.1645 / ge- 2510.1
- Appy, R. G. (1981) Species of Ascarophis van Beneden, 1870 (Nematoda: Cystidicolidae) in North Atlantic fishes. Canadian Journal of Zoology, 59, 2193 - 2205. http: // dx. doi. org / 10.1139 / z 81 - 297
- Berland, B. (1961) Nematodes from some Norwegian marine fishes. Sarsia, 2, 1 - 50. http: // dx. doi. org / 10.1080 / 00364827.1961.10410245