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Acta Parasitologica

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Volume 60, Issue 3


A new Cosmocercoides species (Nematoda: Cosmocercidae), C. tonkinensis n. sp., in the scale-bellied tree lizard (Acanthosaura lepidogaster) from Vietnam

Binh Thi Tran
  • Department of Parasitology, Institute of Ecology and Biological Resources (IEBR), Vietnam Academy of Science and Technology (VAST), 18 Hoang Quoc Viet Road, Cau Giay, Hanoi, Vietnam
  • Other articles by this author:
  • De Gruyter OnlineGoogle Scholar
/ Hiroshi Sato
  • Corresponding author
  • Laboratory of Parasitology, Joint Faculty of Veterinary Medicine, Yamaguchi University, 1677-1 Yoshida, Yamaguchi 753-8515, Japan
  • Email
  • Other articles by this author:
  • De Gruyter OnlineGoogle Scholar
/ Pham Van Luc
Published Online: 2015-06-16 | DOI: https://doi.org/10.1515/ap-2015-0056


A new cosmocercid nematode species, Cosmocercoides tonkinensis n. sp., is described from the scale-bellied tree lizard (Acanthosaura lepidogaster) in the northern and central parts of Vietnam. The new species is characterized by medium-sized male worms (4.2-5.1 mm in length and 0.34-0.37 mm in width) relative to known members of the genus, with lateral alae, two sharply pointed spicules of equal length (0.22-0.26 mm in length), a gubernaculum (0.113-0.122 mm in length), 16 or 17 pairs of caudal rosettes, and the presence of somatic papillae. Female worms are slightly larger than male worms (5.3-5.5 mm in length and 0.32-0.42 mm in width), with the vulva situated at 3/5 from the anterior end, and elliptical embryonated eggs, 0.064- 0.084 mm long by 0.040-0.048 mm wide. From 19 recorded species of the genus, the morphology of C. tonkinensis n. sp. is closest to C. multipapillata, C. bufonis, and C. pulcher reported from toads and frogs in East Asia. The present new species is differentiated from them by the number of caudal rosettes, tail length relative to body length, presence of somatic papillae and lateral alae, and embryonated eggs. Furthermore, after C. variabilis in North America and C. sauria in Brazil, this new species is only the third species to be recorded from a reptilian host. The 18S ribosomal RNA gene (rDNA) of the new species is almost identical to that of C. dukae infecting land snails and slugs in North America. Between the present new species and C. pulcher from a toad (Bufo japonicus) in Japan, remarkably fewer nucleotide changes were noticed in the 18S to 28S rDNA including the internal transcribed spacer regions. The molecular phylogenetic position of the genus Cosmocercoides is briefly discussed.

Keywords : Nematode; Cosmocercoides tonkinensis n. sp.; Acanthosaura lepidogaster; Vietnam; lizard


  • Ananjeva N.B., Orlov N.L., Kalyabina-Hauf, S.A. 2008. Species of Acanthosaura Gray, 1831 (Agamidae: Sauria. Reptilia) of Vietnam: Results of molecular and morphological study. Biology Bulletin, 35, 178-186Web of ScienceCrossrefGoogle Scholar

  • Anisimova M., Gascuel O. 2006. Approximate likelihood-ratio test for branches: a fast, accurate, and powerful alternative. Systematic Biology, 55, 539-552CrossrefPubMedGoogle Scholar

  • Ávila R.W., Strussmann C., Da Silva R.J. 2010. A new species of Cosmocercoides (Nematoda: Cosmocercidae) from a gymnophthalmid lizard of western Brazil. Journal of Parasitology, 96, 558-560Web of ScienceCrossrefGoogle Scholar

  • Bui T.D., Bursey C.R., Goldberg S.R. 2009. A new species of Thelandros (Nematoda, Oxyuroidea, Pharyngodonidae) in Leiolepis reevesi (Sauria, Agamidae) from Vietnam. Acta Parasitologica, 54, 151-153Web of ScienceGoogle Scholar

  • Bursey C.R., Goldberg S.R., Telford S.R., Jr. 2007. Gastrointestinal helminths of 14 species of lizards from Panama with descriptions of 5 new species. Comparative Parasitology, 74, 108-140Web of ScienceGoogle Scholar

  • Chabaud A.G. 1978. Keys to genera of the superfamilies Cosmocercoidea, Seuatoidea, Heterakoidea and Subuluroidea. No. 6. In: (Eds. R. C. Anderson, A. G. Chabaud, and S. Willmott) CIH keys to the Nematode Parasites of Vertebrates. Commonwealth Agricultural Bureaux, Buckinghamshire, U.K., pp. 71Google Scholar

  • Dereeper A., Guignon V., Blanc G., Audic S., Buffet S., Chevenet F., Dufayard J.F., Guindon S., Lefort V., Lescot M., Claverie J.- M., Gascuel O. 2008. Phylogeny.fr: robust phylogenetic analysis for the non-specialist. Nucleic Acids Research, 36, 465-469Web of ScienceCrossrefGoogle Scholar

  • Goldberg S.R., Bursey C.R. 2005. Microhyla heymonsi (Dark-sided Chorus Frog). Endoparasites. Herpetological Review, 36, 303Google Scholar

  • Guindon S., Gascuel O. 2003. A simple, fast, and accurate algorithm to estimate large phylogenies by maximum likelihood. Systematic Biology, 52, 696-704CrossrefPubMedGoogle Scholar

  • Hasegawa H. 1984. Helminth fauna of five Okinawa amphibian species. Biological Magazine, Okinawa, 22, 11-22 (in Japanese with English summary) Hasegawa H., Ikeda Y. 2007. Paracosmocercella rosettae n. gen. et n. sp. (Nematoda: Cosmocercoidea: Cosmocercidae) collected from the Japanese tree frog, Hyla japonica (Anura: Hylidae), in Japan. Journal of Parasitology, 93, 884-888Google Scholar

  • Hsü H.F. 1933. On some parasitic nematodes collected in China. Parasitology, 24, 512-541CrossrefGoogle Scholar

  • Hunt D.J., Spiridonov S.E. 2001. A new genus of Carnoyidae (Nematoda: Rhigonematida) with description of Cattiena trachelomegali gen. n., sp. n. and C. trigoniuli gen. n., sp. n., parasites of spirobolid (Diplopoda) from Vietnam. Nematology, 3, 559-571CrossrefGoogle Scholar

  • Hunt D.J., Luc P.V., Spiridonov S.E. 2002. Bizarre Ichthyocephalidae (Nematoda: Rhigonematida) from Vietnam with description of Ichthyocephaloides comatus sp. n., Xystrongnathus priscus gen. n., sp. n. and X. phrissus gen. n., sp. n. Nematology, 4, 829-843CrossrefGoogle Scholar

  • Karve J.N. 1944. On a small collection of parasitic nematodes from Anura. Proceedings of the Indian Academy of Science, section B, 19, 71-77Google Scholar

  • Khera S. 1958. On a new species of Cosmocercoides. Indian Journal of Helminthology, 10, 6-12Google Scholar

  • Makouloutou P., Setsuda A., Yokoyama M., Tsuji T., Saita E., Torii H., Kaneshiro Y., Sasaki M., Maeda K., Une Y., Hasegawa H., Sato H. 2013. Genetic variation of Gongylonema pulchrum from wild animals and cattle in Japan based on ribosomal RNA and mitochondrial cytochrome c oxidase subunit I genes. Journal of Helminthology, 87, 326-335PubMedCrossrefWeb of ScienceGoogle Scholar

  • Malysheva S.V., Luc P.V. 2012. Cattiena fansipanis n. sp. (Nematoda: Rhigonematida: Carnoyidae) from a millipede (Myriapoda: Diplopoda: Spirobolida) in North Vietnam. Systematic Parasitology, 81, 135-146PubMedWeb of ScienceCrossrefGoogle Scholar

  • Malysheva S.V., Spiridonov S.E. 2010. Four new species of Heth Cobb, 1898 (Rhigonematida: Hethidae) from Vietnamese diplopods. Nematology, 12, 567-585CrossrefWeb of ScienceGoogle Scholar

  • Nguyen Q.T. 2006. Herpetological collaboration in Vietnam. In: (Eds. Vences M., J. Kohler J., Ziegler T., Bohme W.), Herpetologia Bonnensis II. Proceedings of the 13th Congress of the Societas Europaea Herpetologica, pp. 233-240Google Scholar

  • Nguyen V.S., Ho T.C., Nguyen Q.T. 2009. Herpetofauna of Vietnam. Edition of Chimaira, Frankfurt am Main, Hessen, Germany, pp.768Google Scholar

  • Ramallo G., Bursey C.R., Goldberg S.R. 2007. Two new species of cosmocercids (Ascaridida) in the toad Chaunus arenarum (Anura: Bufonidae) from Argentina. Journal of Parasitology, 93, 910-916Web of ScienceCrossrefGoogle Scholar

  • Rizvi A.N. 2009. Two new species of amphibian nematodes from Bhadra Wildlife Sanctuary, Western Ghats, India. Zootaxa, 2013, 58-68Google Scholar

  • Smythe A.B., Sanderson M.J., Nadler S.A. 2006. Nematode small subunit phylogeny correlates with alignment parameters. Systematic Biology, 55, 972-992PubMedCrossrefGoogle Scholar

  • Thompson J.D., Higgins D.G., Gibson T.J. 1994. CLUSTALW: Improving the sensitivity of progressive multiple sequence alignment through sequence weighting, positions-specific gap penalties and weight matrix choice. Nucleic Acids Research, 22, 4673-4680CrossrefGoogle Scholar

  • Tran T.B., Bursey C.R., Goldberg S.R. 2007. Two new species of Pharyngodonidae (Nematoda, Oxyuroidea) in Gekko ulikovskii from Vietnam. Acta Parasitologica, 52, 363-367Web of ScienceGoogle Scholar

  • Vanderburgh D.J., Anderson R.C. 1986. The relationship between nematodes of the genus Cosmocercoides Wilkie, 1930 (Nematoda: Cosmocercoidea) in toads (Bufo americanus) and slugs (Deroceras leave). Canadian Journal of Zoology, 65, 1650-1661Google Scholar

  • Vanderburgh D.J., Anderson R.C. 1987. Seasonal changes in prevalence and intensity of Cosmocercoides dukae (Nematoda: Cosmocercoidea) in Deroceras leave (Mollusca). Canadian Journal of Zoology, 65, 1662-1665CrossrefGoogle Scholar

  • Wilkie J.S. 1930. Some parasitic nematodes from Japan. Annals and Magazine of Natural History, London, 10, 606-614Google Scholar

  • Wood P.L., Jr., Grismer J.L., Grismer L.L., Norhayati A., Chan K.O., Bauer A.M. 2009. Two new montane species of Acanthosaura Gray, 1831 (Squamata: Agamidae) from Peninsular Malaysia. Zootaxa, 2012, 28-46Google Scholar

  • Wood P.L., Jr., Grismer L.L., Grismer J.L., Neang T., Chav T., Holden J. 2010. A new cryptic species of Acanthosaura Gray, 1831 (Squamata: Agamidae) from Thailand and Cambodia. Zootaxa, 2488, 22-38Google Scholar

  • Yamaguti S. 1941. Studies on the helminth fauna of Japan. Pt. 34. Amphibian nematodes, II. Japanese Journal of Zoology, 9, 397-408Google Scholar

About the article

Received: 2014-04-07

Revised: 2015-01-08

Accepted: 2015-02-25

Published Online: 2015-06-16

Published in Print: 2015-09-01

Citation Information: Acta Parasitologica, Volume 60, Issue 3, Pages 407–416, ISSN (Online) 1896-1851, ISSN (Print) 1230-2821, DOI: https://doi.org/10.1515/ap-2015-0056.

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