Abstract
We report here for the first time horsehair worms (Nematomorpha) from Hong Kong (China). Most specimens belong to the genus Chordodes, and can be assigned to C. bipilus, C. caledoniensis and to C. cf. moutoni. Two specimens have a cuticular pattern resembling the South American species C. peraccae or C. bouvieri, but for Southeast Asia this pattern is new. These two specimens are reported here as Chordodes sp. Additionally, Gordionus chinensis was found. One new species, Acutogordius koljai, is described from Malaysia. It has a characteristically-structured region posterior to the postcloacal crescent which sets it apart from previously described species in this genus.
References
Camerano, L. (1890) Viaggio di Leornardo Fea in Birmania e regioni vicine. XXVII. Gordii. Annali del Museo Civico di Storia Naturale di Genova, 10, 128–131.
Camerano, L. (1895) Description d’une nouvelle espéce de Gordien de la Chine. Bulletin de la Societé Zoologique de France, 20, 99–100.
https://doi.org/10.5962/bhl.part.29688Camerano, L. (1896) Gordiens nouveaux ou peu connus du Musée Zoologique de l´Academie Impériale des Sciences de St.-Pétersbourg. Annuaire du Musee Zoologique de l'Academie d. Sciences de St. Petersbourg, 1, 117–125.
Camerano, L. (1897) Monografia dei Gordii. Memoire della Reale Accademia delle Science di Torino, 47, 339–415.
Camerano, L. (1899) Gordii della Malesia e del Messico. Atti delle Reale Accademia delle Science di Torino, 34, 460–469.
Camerano, L. (1901) Gordii raccolti della spedizione “Skeat” nella Penisola Malese 1899–1900. Bollettino dei Musei di Zoologia e Anatomia Comparata della Reale Universita di Torino, 16 (408), 1–2.
Camerano, L. (1903) Nuova specie di Gordii del Basso Siam. Bollettino dei Musei di Zoologia e Anatomia Comparata della Reale Universita di Torino, 18 (437), 1–3.
Camerano, L. (1915) Revisione dei Gordii. Memoire della Reale Accademia delle Science di Torino, 66, 1–66.
Chiu, M.C., Huang, C.G., Wu, W.J. & Shiao, S.F. (2011) A new horsehair worm, Chordodes formosanus n. sp. (Nematomorpha: Gordiida) from Hierodula mantids of Taiwan and Japan with redescription of a closely related species, Chordodes japonensis. Zookeys, 160, 1–22.
https://doi.org/10.3897/zookeys.160.2290De Villalobos, C. & Zanca, F. (2001) Scanning electron microscopy and intraspecific variation of Chordodes festae Camerano, 1897 and C. peraccae (Camerano, 1894) (Nematomorpha: Gordioidea). Systematic Parasitology, 50, 117–125.
https://doi.org/10.1023/A:1011921326564De Villalobos, C., Zanca, F. & Yanez, A.B. (2009) Three new species of Chordodes and new data on hairworms (Nematomorpha) from Ecuador. Zootaxa, 2205, 37–52.
Dorier, A. (1946) Révision de quelques espéces de Gordiacés. Bulletin du Muséum National de Histoire Naturelle, 18, 480–494.
Heinze, K. (1935) Weitere neue Parachordodes-Arten aus Asien. Zoologischer Anzeiger, 112, 155–158.
Inoue, I. (1966) A new species of Euchordodes (Gordiacea) from Malaysia. Annotationes Zoologicae Japonenses, 39, 60–62.
Kirjanova, E.S. (1957) Deux nouvelles espèces de Nematomorpha du genre Chordodes (Creplin, 1847) Möbius, 1855. Zoologicheskii Zhurnal, 36, 1159–1166. [in Russian with French summary]
Schmidt-Rhaesa, A. (2011) Beatogordius chinensis (Nematomorpha, Gordiida), a new species from China. Verhandlungen des Naturwissenschaftlichen Vereins in Hamburg, 46, 243–248.
Schmidt-Rhaesa, A. (2013) Nematomorpha. In: Schmidt-Rhaesa, A. (Ed), Handbook of Zoology. Gastrotricha, Cycloneuralia and Gnathifera. Vol. 1. Nematomorpha, Priapulida, Kinorhyncha and Loricifera. De Gruyter, Berlin, pp. 29–145.
Schmidt-Rhaesa, A. & Brune, S. (2008) Description of one known and three new Chordodes species (Nematomorpha) parasitizing praying mantids (Mantoptera) in Malaysia, with a discussion of sexual dimorphism in Chordodes. Zoosystematics and Evolution, 84, 57–66.
https://doi.org/10.1002/zoos.200700014Schmidt-Rhaesa, A. & Ehrmann, R. (2001) Horsehair worms (Nematomorpha) as parasites of praying mantids. Zoologischer Anzeiger, 240, 167–179.
https://doi.org/10.1078/0044-5231-00014Schmidt-Rhaesa, A. & Geraci, C.J. (2006) Two new species of Acutogordius (Nematomorpha), with a brief review of literature data of this genus. Biodiversity and Systematics, 4, 427–433.
https://doi.org/10.1017/S1477200006001964Schmidt-Rhaesa, A. & Lalramliana (2016) New records of Indian Nematomorpha, with the description of one new species from the genus Chordodes. Zootaxa, 4158 (2), 272–280.
https://doi.org/10.11646/zootaxa.4158.2.8Schmidt-Rhaesa, A. & Sato, T. (2009) Gordionus chinensis (Villot, 1874) and Gordionus kii sp.n. (Nematomorpha, Gordiida), new reports of the genus Gordionus in Japan. Species Diversity, 14, 61–67
Schmidt-Rhaesa, A. & Schwarz, C.J. (2016) Nematomorpha from the Philippines, with description of two new species. Zootaxa, 4158 (2), 246–260.
https://doi.org/10.11646/zootaxa.4158.2.6Schmidt-Rhaesa, A. & Yadav, A. (2013) One new species and a new record of the genus Chordodes (Nematomorpha: Gordiida) from North-East India. Zootaxa, 3693 (2), 293–300.
https://doi.org/10.11646/zootaxa.3693.2.10Schmidt-Rhaesa, A., De Villalobos, L.C. & Zanca, F. (2008) Summary of Chordodes species (Nematomorpha, Gordiida), with a discussion of their diagnostic characters. Verhandlungen des Naturwissenschaftlichen Vereins in Hamburg, 44, 37–114.
Schmidt-Rhaesa, A., Nishi, H., Tanabe, A.S. & Urabe, M. (2009) New records of hairworms (Nematomorpha, Gordiida) from Japan. Species Diversity, 14, 131–135
Schmidt-Rhaesa, A., LimaTemjen & Yadav, A.K. (2015) Chordodes combiareolatus, a new species of horsehair worms (Nematomorpha) from Nagaland, India, with further comments on Chordodes moutoni. Zootaxa, 3925 (2), 202–210.
https://doi.org/10.11646/zootaxa.3925.2.3Tang, S.T. (1934) Description of three new species of the Nematomorpha of Fukien. Sinensia, 4, 201–208.
Villot, A. (1874) Monographie des Dragonneaux (Genre Gordius, Dujardin), introduction + première partie. Taxonomie et histoire naturelle. Archives de Zoologie Expérimentale et Générale, 3, 39–72.
Wu, H.W. & Tang, S.F. (1933) Notes on the Nematomorpha of China. Sinensia, 3, 173–178.
Zanca, F. & De Villalobos, C. (2005) Scanning electron microscopy of Chordodes moutoni Camerano, 1895 (Gordiida, Nematomorpha). Zootaxa, 1082 (1), 37–44.
https://doi.org/10.11646/zootaxa.1082.1.3