Cosmocephalus obvelatus (Creplin, 1825) Seurat 1919

• Main Authors: Arai, Hisao P., Smith, John W.
• Format: Text
• Language: unknown
• Published: Zenodo 2016
• Subjects: Biodiversity; Taxonomy; Animalia; Nematoda; Secernentea; Spirurida; Acuariidae; Cosmocephalus; Cosmocephalus obvelatus; Canada; Midland; Northwest Atlantic
• Online Access: https://dx.doi.org/10.5281/zenodo.5626850; https://zenodo.org/record/5626850

* Cosmocephalus obvelatus (Creplin, 1825) Seurat, 1919 Description (after Wong & Anderson 1982). In the apparent absence of a description of L3 from fishes the following is based on Wong & Anderson’s (1982) account of L3 from experimentally infected amphipods. L3 are 2.05 (1.63–2.40) long, and 0.071 (0.058–0.095) wide. Head with two triangular pseudolabia and four submedian cephalic papillae (Fig. 69 A). Amphids small. Buccal cavity long and narrow but expanded in oral region. Pair of inconspicuous deirids immediately behind nerve ring. Excretory pore opens 0.16 (0.14–0.19) from anterior end (Fig. 69 B). Total oesophagus [muscular plus glandular portions] 1.15 (0.99–1.40) long. Rectum tubular with thick cuticle. Tail tip rounded. Pair of large phasmids subventrally (Fig. 69 C). Genital primordium of males a simple tube lying free in pseudocoelom; that of females a similar tube but attached to body wall by vaginal primordium (Fig. 69D). Site: mesenteries Hosts: Apeltes quadracus (2); Carassius auratus (1); Cottus sp. (1); Fundulus heteroclitus (3); Gasterosteus aculeatus (1, 2); Notropis hudsonius (1); Notropis sp. (1); Oncorhynchus mykiss (1); Osmerus mordax (1); Pungitius pungitius (2, 3); Semotilus atromaculatus (1) Distribution: Nova Scotia, Ontario Records: 1. Wong & Anderson 1982 (EX, ON); 2. Marcogliese 1992b (NS); 3. Marcogliese 1995b (NS) : 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 page 115, DOI: 10.11646/zootaxa.4185.1.1, http://zenodo.org/record/165530 : {"references": ["Marcogliese, D. J. (1992 b) Metazoan parasites of sticklebacks on Sable Island, northwest Atlantic Ocean: biogeographic considerations. Journal of Fish Biology, 41, 399 - 407. http: // dx. doi. org / 10.1111 / j. 1095 - 8649.1992. tb 02668. x", "Marcogliese, D. J. (1995 b) Comparison of parasites of mummichogs and sticklebacks from brackish and freshwater ponds on Sable Island, Nova Scotia. American Midland Naturalist, 133, 333 - 343. http: // dx. doi. org / 10.2307 / 2426398"]}