Clavinema mariae (Layman, 1930) Yamaguti 1935
Creators
Description
Clavinema mariae (Layman, 1930) Yamaguti, 1935
Synonyms: Philometra mariae Layman, 1930; Philometra americana Kuitunen-Ekbaum, 1933; Philometra sp. of Arai (1967 partim)
Description (after Margolis & Moravec 1987). With characteristics of the genus. Males unknown.
Females: body of gravid and subgravid worms distinctly narrower in posterior half. Cuticle smooth. 23.6–48.5
long; maximum width 0.74–1.90. Gravid worms with larvae in uteri 33.7–48.5 long; maximum width 0.74–1.49.
Head end rounded, with elevated oesophageal bulb region (0.115 long and 0.322 wide) in larger worms. Mouth
papillae not observed. Mouth slightly depressed. Anterior end of oesophagus forming a conspicuous, strongly
muscular bulb, well separated from posterior cylindrical portion of oesophagus; bulb 0.202–0.326–0.235–0.398.
Small, not well demarcated oesophageal gland situated about middle of posterior portion of oesophagus. Entire
oesophagus including bulb 0.958–1.442 long (Fig. 29 A). Oesophagus opens into intestine through distinct valves.
Nerve ring encircles anterior end of cylindrical portion of oesophagus, 0.281–0.446 from anterior end (Fig. 29 A).
Intestine dark and broad throughout, attached by short ligament to ventral body wall near posterior end (Fig. 29 C).
Uterus containing eggs, developing embryos, and larvae. Larvae 0.300–0.426 long and 0.009–0.018 maximum
width. Vulva absent. Uterus reaches anteriorly to posterior end of oesophageal bulb in gravid worms (Fig. 29 A) or
near it in subgravid worms (Fig. 29 B). Anterior ovary tubular, well developed. Posterior ovary directed anteriorly,
its distal end pointing backwards. Uterus reaching posteriorly almost to posterior end of intestine. Posterior end of
body rounded, lacking projections or papillae (Fig. 29 C).
Sites: body cavity, fins, musculature, subcutaneous
Hosts: Anoplarchus purpurescens (2); Cottus asper (9); Gobiesox maeandricus (1, 2); Parophrys vetulus (3, 4, 7); Pholis laeta (5, 6); Pholis ornata (1, 2); Platichthys stellatus (1, 2, 4, 8); Paraplagusia bilineata (1, 2); Xiphister atropurpureus (1, 2)
Distribution: British Columbia, Pacific
Records: 1. Kuitunen-Ekbaum 1933c (PA); 2. Kuitunen-Ekbaum 1938 (PA); 3. Margolis 1952a (PA); 4. Margolis 1952b (PA); 5. Arai 1967a (PA); 6. Arai 1969 (PA); 7. Margolis 1970 (PA); 8. Lewis 1978 (PA); 9. Margolis & Moravec 1987 (BC, PA)
Notes
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Linked records
Additional details
Identifiers
Biodiversity
- Family
- Philometridae
- Genus
- Clavinema
- Kingdom
- Animalia
- Order
- Spirurida
- Phylum
- Nematoda
- Scientific name authorship
- (Layman, 1930) Yamaguti
- Species
- mariae
- Taxon rank
- species
- Taxonomic concept label
- Clavinema mariae (Layman, 1935 sec. Arai & Smith, 2016
References
- Yamaguti, S. (1935) Studies on the helminth fauna of Japan. Part 9. Nematodes of fishes, I. Japanese Journal of Zoology, 6, 337 - 386. http: // dx. doi. org / 10.1017 / s 0022149 x 00017788
- Margolis, L. & Moravec, F. (1987) A record of Clavinema mariae (Layman, 1930) (Nematoda: Philometridae) from a North American freshwater fish, with notes on the systematic status of Philometra americanus Kuitunen-Ekbaum, 1933. Folia Parasitologica, 34, 31 - 36.
- Kuitunen-Ekbaum, E. (1933 c) A case of dracontiasis in Pacific coastal fishes. Contributions to Canadian Biology and Fisheries, New Series, 9, 161 - 168. http: // dx. doi. org / 10.1139 / f 33 - 013
- Kuitunen-Ekbaum, E. (1938) A study of the dracunculid nematode, Philometra americanus Kuitunen-Ekbaum, with notes on related species. Ph. D. Dissertation, University of Toronto, Toronto, Canada, 117 pp.
- Margolis, L. (1952 a) Unpublished data. Institute of Parasitology, McGill University, Montreal, Quebec.
- Margolis, L. (1952 b) Studies on the parasites and diseases of marine and anadromous fish from the Canadian Pacific coast. Ph. D. Dissertation, Institute of Parasitology, McGill University, Montreal, Quebec.
- Arai, H. P. (1967 a) A preliminary report on a study of the parasites of Burke Channel, British Columbia. Fisheries Research Board of Canada Manuscript Reports, 925, 26 pp.
- Arai, H. P. (1969) Preliminary report on the parasites of certain marine fishes of British Columbia. Journal of the Fisheries Research Board of Canada, 26, 2319 - 2337. http: // dx. doi. org / 10.1139 / f 69 - 226
- Margolis, L. (1970) Nematode diseases of marine fishes. In: Snieszko, S. F. (Ed.), A Symposium on Diseases of Fishes and Shellfishes. American Fisheries Society Special Publication, No. 5, pp. 190 - 208.
- Lewis, J. W. (1978) Mechanism of larval release in dracunculoid nematodes. Parasitology, 77, vi.