Acta Parasitologica

, Volume 56, Issue 1, pp 58–66 | Cite as

Observations on two nematode species parasitizing freshwater fishes in Thailand, including Spinitectus thaiensis sp. nov. (Cystidicolidae) from Pseudomystus siamensis (Bagridae)

  • František Moravec
  • Thanapon Yooyen


One new and one already known species of parasitic nematodes are described from the intestine of freshwater fishes in Chiang Mai Province, northern Thailand: Spinitectus thaiensis sp. nov. (Cystidicolidae) from the catfish Pseudomystus siamensis (Regan) (Bagridae, Siluriformes) in the Fang Brook, a tributary of the Kok River (the Mekong River basin), Fang District and Oceanicucullanus chitwoodae Le-Van-Hoa et Pham-Ngoc-Khue, 1971 (Cucullanidae) from the cyprinid Mystacoleucus marginatus (Valenciennes) (Cyprinidae, Cypriniformes) in the Ping River (the Chao Phraya River basin), Muang District. The new species, S. thaiensis, is very similar to S. petrowi Belous, 1965, differing from it, in addition to some biometrical differences, mainly in having simple cuticular spines (instead of transversely oriented peg-like spines with rounded ends) on the ventral surface of the female tail; the spicules are 156–171 and 66–72 μm long, the vulva is situated at 74% of female body length, and the entire oesophagus including the vestibule represents 14–15% of body length in the male and 12% in the female. The latter species, O. chitwoodae, was studied for the first time by scanning electron microscopy, which enabled to recognize some previously unrecorded morphological details in this species. The finding of O. chitwoodae in M. marginatus in Thailand represents new host and geographical records for this nematode.


Parasitic nematode Oceanicucullanus Spinitectus freshwater fish Mystacoleucus Pseudomystus Thailand 


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  1. Ali M.M. 1980. On a larva of a spiruroid nematode of fish. Acta Parasitologica Polonica, 27, 387–389.Google Scholar
  2. Arthur J.R., Lumanlan-Mayo S. 1997. Checklist of the parasites of fishes of the Philippines. FAO Fisheries Technical Paper. No. 369, FAO, Rome, 126 pp.Google Scholar
  3. Arya S.N. 1971. Synonymy of the genus Oceanicucullanus Schmidt and Kuntz, 1969 with the genus Indocucullanus Ali, 1956 with the proposal of two new subgenera. Rivista di Parassitologia, 51, 179–182.Google Scholar
  4. Chabaud A.G. 1975. Keys to genera of the order Spirurida. Part 2. Spiruroidea, Habronematoidea and Acuarioidea. In: (Eds. R.C. Anderson, A.G. Chabaud and S. Willmott) CIH keys to the nematode parasites of vertebrates. No. 3. Commonwealth Agricultural Bureaux, Farnham Royal, Bucks (UK), 58 pp.Google Scholar
  5. Chabaud A.G. 1978. Keys to genera of the superfamilies Cosmocercoidea, Seuratoidea, Heterakoidea and Subuluroidea. In: (Eds. R.C. Anderson, A.G. Chabaud, S. Willmott) CIH keys to the nematode parasites of vertebrates. No. 6. Commonwealth Agricultural Bureaux, Farnham Royal, Bucks (UK), 27 pp.Google Scholar
  6. Froese R., Pauly D. (Eds.) 2010. FishBase. World Wide Web electronic publication,, version October/2010.
  7. Ivashkin V.M., Khromova L.A. 1976. Cucullanata and Gnathostomatata of animals and man and the diseases caused by them. Essentials of Nematodology 27. Nauka, Moscow, 436 pp. (in Russian).Google Scholar
  8. Kalyankar S.D. 1971. A new nematode, Neospinitectus ophiocephali gen. n., sp. n. (Rhabdochonidae, Spinitectinae) from a freshwater fish Ophiocephalus punctatus (Day). Acta Parasitologica Polonica, 19, 247–249.Google Scholar
  9. Le-Van-Hoa. 1973. Mise en synonymie du genre Chitwoodia Le Van Hoa et al. 1971 avec Oceanicucullanus Schmidt et al. 1969. Annales de Parasitologie Humaine et Comparée, 48, 699–702.PubMedGoogle Scholar
  10. Le-Van-Hoa, Pham-Ngoc-Khue. 1971. Relation taxonomique entre Gendria Baylis, 1930 et Cucullanus Mueller, 1777 (Remarques sur la superfamille Seuratoidea Chabaud, Campana-Rouget et Brygoo, 1959). Annales de Parasitologie Humaine et Comparée, 46, 595–604.PubMedGoogle Scholar
  11. Mamaev Yu.L. 1968. Helminths of tuna fishes of the Sea of China. In: (Eds. K.I. Skryabin and Yu.L. Mamaev) Helminths of animals of the Pacific Ocean. Nauka, Moscow, pp. 5–27 (in Russian).Google Scholar
  12. Moravec F. 2007. Some aspects of the taxonomy and biology of adult spirurine nematodes parasitic in fishes: a review. Folia Parasitologica, 54, 239–257.PubMedGoogle Scholar
  13. Moravec F., Fiala I., Dyková I. 2004a. Philometra thaiensis sp. nov. (Nematoda, Philometridae) from Tetraodon palembangensis and T. fluviatilis (Pisces) from fresh waters in Thailand, with a key to Philometra spp. parasitic in the host’s abdominal cavity. Acta Parasitologica, 49, 319–324.Google Scholar
  14. Moravec F., García-Magaña L., Salgado-Maldonado G. 2002. Spinitectus tabascoensis sp. nov. (Nematoda, Cystidicolidae) from Ictalurus furcatus (Pisces) in southeastern Mexico. Acta Parasitologica, 47, 224–227.Google Scholar
  15. Moravec F., Laoprasert T. 2008. Redescription of Ichtyouris bursata Moravec & Prouza, 1995 (Nematoda: Pharyngodonidae), a parasite of wild and aquarium-reared discus Symphysodon spp. (Osteichthyes). Systematic Parasitology, 71, 137–143. DOI: 10.1007/s11230-008-9144-8.CrossRefPubMedGoogle Scholar
  16. Moravec F., Nie P., Wang G. 2004b. New data on the morphology and systematic status of Spinitectus petrowi and Spinitectus gigi (Nematoda: Cystidicolidae) parasitic in catfishes in central China. Folia Parasitologica, 51, 339–351.PubMedGoogle Scholar
  17. Moravec F., Scholz T. 1991. Observations on some nematodes parasitic in freshwater fishes in Laos. Folia Parasitologica, 38, 163–178, plts. I–VIII.PubMedGoogle Scholar
  18. Moravec F., Wolter J., Körting W. 1999. Some nematodes and acanthocephalans from exotic ornamental fishes imported into Germany. Folia Parasitologica, 46, 296–310.PubMedGoogle Scholar
  19. Moravec F., Yooyen T. 2011. Two new species of Rhabdochona (Nematoda: Rhabdochonidae) from freshwater fishes in Thailand. Folia Parasitologica, in press.Google Scholar
  20. Petter A.J. 1974. Essai de classification de la famille des Cucullanidae. Bulletin du Muséum National d’Histoire Naturelle, 3 Série, No. 255, Zoologie, 177, 1469–1490.Google Scholar
  21. Petter A.J. 1979. Trois Nématodes parasites de Poissons en Malaisie. Bulletin du Muséum National d’Histoire Naturelle, 4 Série, Section A, 1, 585–596.Google Scholar
  22. Purivirojkul W. 2009. Fish parasite diversity in the Mekong River in the north of Thailand. KKU Science Journal, 37(Suppl.), 62–70.Google Scholar
  23. Ratanasritong S., Kliks M. 1972. A survey of the helminth parasites of freshwater fish in Chiang Mai Province. Bulletin of Chiang Mai Medical Technology, 5, 185–200.Google Scholar
  24. Schmidt G.D., Kuntz R.E. 1969. Nematode parasites of Oceanica. V. Four new species from fishes of Palawan, P. I., with a proposal for Oceanicucullanus gen. nov. Parasitology, 59, 389–396. DOI: 10.1017/S0031182000082354.CrossRefPubMedGoogle Scholar
  25. Singh I., Tandon M.P. 2002. Taxometric assessments of Spinitectus caudispinulata sp. nov. from a food fish of River Yamuna at Allahabad. Experimental Pathology and Parasitology, 5/9, 25–31.Google Scholar
  26. Sirikanchana P. 1982. Check lists of parasites of fishes in Thailand. Kasetsart University Museum of Fisheries, Bangkok, 11 pp.Google Scholar
  27. Sood M.L. 1989. Fish nematodes from South Asia. Kalyani Publishers, New Delhi, 703 pp.Google Scholar
  28. Soota T.D. 1983. Studies on nematode parasites of Indian vertebrates I. Fishes. Records of the Zoological Survey of India, occasional paper no. 54. Zoological Survey of India, Calcutta, 352 pp.Google Scholar
  29. Yooyen T., Moravec F., Wongsawad C. 2011. Two new species of Cucullanus Müller, 1777 (Nematoda: Cucullanidae) from marine fishes off Thailand. Systematic Parasitology, in press.Google Scholar

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© © Versita Warsaw and Springer-Verlag Wien 2011

Authors and Affiliations

  1. 1.Institute of Parasitology, Biology CentreAcademy of Sciences of the Czech RepublicČeské BudějoviceCzech Republic
  2. 2.Department of Biology, Faculty of ScienceChiang Mai UniversityChiang MaiThailand

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