Abstract
The nematode Rhabdochona cotti Gustafson, 1949 is redescribed from specimens collected from the intestine of the blue ridge sculpin Cottus caeruleomentum (a new host record), a recently described fish species, from Little Fishing Creek in Maryland, USA. The measurements of these specimens, collected in November 2005, are generally smaller than those reported in the original description of R. cotti, this being probably associated with the nematode’s seasonal maturation cycle or the different host species. As revealed by SEM, the deirids of R. cotti are simple (not bifurcate), in which this species differs from almost all North American congeners. Of these, simple deirids, filamented eggs and a rounded tail tip in females occur only in Rhabdochona longleyi, but it distinctly differs from R. cotti in the smaller number of anterior prostomal teeth (6 vs. 14). Rhabdochona rotundicaudatum is considered a junior synonym of Rhabdochona cascadilla; numerous specimens of the latter were collected from Semotilus atromaculatus, Luxilus cornutus and Notropis rubellus from the type locality (Eramosa River, Ontario, Canada) (unpublished). Rhabdochona paxmani and Rhabdochona salmonis are synonymized with Rhabdochona kisutchi, whereas Rhabdochona californiensis is considered a junior synonym of R. cascadilla. The need of a taxonomic revision of North American species of Rhabdochona is stressed.
[1] Anderson R.C. 2000. Nematode parasites of vertebrates. Their development and transmission. CABI Publishing, Oxon and New York. 10.1079/9780851994215.0001Search in Google Scholar
[2] Arai H.P., Mudry D.R. 1983. Protozoan and metazoan parasites of fishes from the headwaters of the Parsnip and McGregor rivers, British Columbia: a study of possible parasite transfaunations. Canadian Journal of Fisheries and Aquatic Sciences, 40, 1676–1684. Search in Google Scholar
[3] Bangham R.V., Adams J.R. 1954. A survey of the parasites of freshwater fishes from the mainland of British Columbia. Journal of the Fisheries Research Board of Canada, 11, 673–708. Search in Google Scholar
[4] Bilqees F.M. 1979. Rhabdochona parastromatei sp. n. (Nematoda, Rhabdochonidae) from the fish Parastromateus niger (Bleeker) of the Karachi coast. Zoologica Scripta, 88, 107–110. Search in Google Scholar
[5] Byrne P.J. 1992a. Rhabdochona rotundicaudatum n. sp. and a redescription of R. cascadilla Wigdor, 1918 (Nematoda: Thelazioidea) from minnows in southern Ontario, Canada. Canadian Journal of Zoology, 70, 476–484. http://dx.doi.org/10.1139/z92-07210.1139/z92-072Search in Google Scholar
[6] Byrne P.J. 1992b. On the biology of Rhabdochona rotundicaudatum and R. cascadilla (Nematoda: Thelazioidea) in stream fishes from southern Ontario, Canada. Canadian Journal of Zoology, 70, 485–493. Search in Google Scholar
[7] Campana-Rouget Y. 1955. Sur deux nouveaux genres de spirurides parasites de poissons; discussion systématiques des genres voisins. Annales de Parasitologie Humaine et Comparée, 30, 346–362. Search in Google Scholar
[8] Choquette L.P.E. 1951. On the nematode genus Rhabdochona Railliet, 1916 (Nematoda: Spiruroidea). Canadian Journal of Zoology, 29, 1–16. http://dx.doi.org/10.1139/z51-00110.1139/z51-001Search in Google Scholar
[9] Dechtiar A.O. 1972. Parasites of fish from Lake of the Woods, Ontario. Journal of the Fisheries Research Board of Canada, 29, 275–283. Search in Google Scholar
[10] Froese R., Pauly D. (Eds.) 2006. FishBase, World Wide Web electronic publication, www.fishbase.org, version 8/2006. Search in Google Scholar
[11] Gustafson P.V. 1942. A peculiar larval development of Rhabdochona spp. (Nematoda: Thelaziidae). Journal of Parasitology, 28(Suppl.), 30. Search in Google Scholar
[12] Gustafson P.V. 1949. Description of some species of Rhabdochona (Nematoda: Thelaziidae). Journal of Parasitology, 35, 534–540. http://dx.doi.org/10.2307/327365710.2307/3273657Search in Google Scholar
[13] Heckmann R.A., Kimball A.J., Short J.A. 1987. Parasites of mottled sculpin, Cottus bairdi Girard, from five locations in Utah and Wasatch Counties, Utah. Great Basin Naturalist, 47, 13–21. Search in Google Scholar
[14] Hoffman G.L. 1999. Parasites of North American Freshwater Fishes. Cornell University Press, Ithaca and London. 10.7591/9781501735059Search in Google Scholar
[15] Holloway H.L., Klewer H.L. 1969. Rhabdochona beatriceinsleyae n. sp. (Nematoda: Spiruridea: Rhabdochonidae), from the Antarctic zoarcid, Rhigophila dearborni. Transactions of the American Microscopical Society, 88, 460–471. http://dx.doi.org/10.2307/322423910.2307/3224239Search in Google Scholar
[16] Johnston T.H., Mawson R.M. 1945. Parasitic nematodes. Reports of the B.A.N.Z. Antarctic Research Expedition 1929–1931, 5(Part 2), 73–159. Search in Google Scholar
[17] Kinziger A.P., Raesly R.L., Neely D.A. 2000. New species of Cottus (Teleostei: Cottidae) from the Middle Atlantic eastern United States. Copeia, (4), 1007–1018. Search in Google Scholar
[18] Lakshmi B.B., Sudha M. 1999. On a new species Rhabdochona marina (Nematoda: Rhabdochonidae) from the intestine of Pempheris vanicolensis (Cuvier) [sic] of Visakhapatnam. Uttar Pradesh Journal of Zoology, 19, 165–170. Search in Google Scholar
[19] Maggenti A.R., Abdel-Rahman F., Cid del Prado Vera I. 1992. New species of Rhabdochona Railliet, 1916 (Nemata: Rhabdochonidae) from rainbow trout in California streams. Journal of Nematology, 24, 379–390. Search in Google Scholar
[20] Margolis L., Moravec F., McDonald T.E. 1975. Rhabdochona kisutchi sp. nov. (Nematoda: Spiruroidea) from coho salmon, Oncorhynchus kisutch (Walbaum), of western Canada. Canadian Journal of Zoology, 53, 960–966. Search in Google Scholar
[21] Moravec F. 1972a. General characterization of the nematode genus Rhabdochona with a revision of the South American species. Acta Societatis Zoologicae Bohemoslovacae, 36, 29–46. Search in Google Scholar
[22] Moravec F. 1972b. Studies on the development of the nematode Rhabdochona (Filochona) ergensi Moravec, 1968. Folia Parasitologica, 19, 321–333. Search in Google Scholar
[23] Moravec F. 1977. Life history of the nematode Rhabdochona phoxini Moravec, 1968 in the Rokytka Brook, Czechoslovakia. Folia Parasitologica, 24, 97–105. Search in Google Scholar
[24] Moravec F. 1983. Rhabdochona puylaerti sp. n. (Nematoda: Rhabdochonidae) recorded from the African viper Causus rhombeatus (Lichtenstein). Folia Parasitologica, 30, 313–317. Search in Google Scholar
[25] Moravec F. 1994. Parasitic nematodes of freshwater fishes of Europe. Academia and Kluwer Academic Publishers, Prague and Dordrecht, Boston, London. Search in Google Scholar
[26] Moravec F., Arai H.P. 1971. The North and Central American species of Rhabdochona Railliet, 1916 (Nematoda: Rhabdochonidae) of fishes, including Rhabdochona canadensis sp. nov. Journal of the Fisheries Research Board of Canada, 28, 1645–1668. Search in Google Scholar
[27] Moravec F., Huffman D.G., 1988. Rhabdochona longleyi sp. n. (Nematoda: Rhabdochonidae) from blind catfishes, Trogloglanis pattersoni and Satan eurystomus (Ictaluridae) from the subterranean waters of Texas. Folia Parasitologica, 35, 235–243. Search in Google Scholar
[28] Moravec F., Lorber J., Konečný R. 2007. Two new species of parasitic nematodes from the dogtooth tuna Gymnosarda unicolor (Pisces) off the Maldive Islands. Journal of Parasitology, in press. 10.1645/GE-965R.1Search in Google Scholar PubMed
[29] Moravec F., Scholz T. 1995. Life history of the nematode Rhabdochona hellichi, a parasite of the barbel in the Jihlava River, Czech Republic. Journal of Helminthology, 69, 59–64. http://dx.doi.org/10.1017/S0022149X0001384510.1017/S0022149X00013845Search in Google Scholar
[30] Mudry D.R., Anderson R.S. 1977. Helminth and arthropod parasites of fishes in the mountain national parks of Canada. Journal of Fish Biology, 11, 21–33. http://dx.doi.org/10.1111/j.1095-8649.1977.tb04095.x10.1111/j.1095-8649.1977.tb04095.xSearch in Google Scholar
[31] Muzzall P.M., Sweet R.D. 1986. Parasites of mottled sculpins, Cottus bairdi, from the Au Sable River, Crawford County, Michigan. Proceedings of the Helminthological Society of Washington, 53, 142–143. Search in Google Scholar
[32] Muzzall P.M., Whelan G.E. 1995. Rhabdochona cotti (Nematoda: Rhabdochonidae) in mottled sculpins, Cottus bairdi, from the Ford River, Michigan. Journal of Parasitology, 81, 488–490. http://dx.doi.org/10.2307/328383810.2307/3283838Search in Google Scholar
[33] Wigdor M. 1918. Two new nematodes common in some fishes of Cayuga Lake. Journal of Parasitology, 5, 29–34. http://dx.doi.org/10.2307/327117610.2307/3271176Search in Google Scholar
© 2007 W. Stefański Institute of Parasitology, PAS
This work is licensed under the Creative Commons Attribution-NonCommercial-NoDerivatives 3.0 License.
