, Volume 379, Issue 1–3, pp 97–110 | Cite as

Nematodes from the Strait of Magellan and the Beagle Channel (Chile): Description of four new species of the Comesomatidae

  • Guotong Chen
  • Magda Vincx


Four nematode species of the Comesomatidae from the Strait of Magellan and the Beagle Channel, Chile, are described as new to science. Comesoma hermani n. sp. can be separated from similar species, Comesoma bermudense Jensen & Gerlach, 1977, Comesoma minimum Chitwood, 1937 and Comesoma chilense Jensen & Gerlach, 1977 by the difference of body length, cephalic setae length, the ratio of the subcephalic setae to cephalic setae length and the ratio of spicule to anal body diameter. Dorylaimopsis magellanense n. sp. is identified by the lateral differentiation of 3–4 longitudinal rows of enlarged dots, the curved spicules are prominently jointed and with a ventral protrusion. Hopperia beaglense n. sp. could be easily recognised by both the rounded tail tip and anterior head end which differs from all the species of this genus except H. dorylaimopsoides (Allgén, 1959), which has, however, a smaller de Man ratio 'a' and reflexed ovaries. Hopperia arntzi n. sp. has a shorter body length which differs from the closest species, Hopperia americana Ward, 1984 and Hopperia muscatensis Warwick, 1973. Furthermore, the de Man ratio 'a' is different between our specimens and the other two species. An identification key to all known species of the genus Hopperia is provided.

marine nematodes Comesomatidae the Chile 


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  1. Allgán, C. A., 1959. Freeliving marine nematodes. Further Zoological Results of the Swedish Antarctic Expedition 1901–1903. Stockholm, 5: 1–293.Google Scholar
  2. Chitwood, B. G., 1937. A new genus and ten new species of marine nematodes from North Carolina. Proc. Helminth. Soc. Wash. 4: 54–59.Google Scholar
  3. Hope, W. D. & Z. N. Zhang, 1995. New nematodes from the Yellow Sea, Hopperia hexdentata n. sp. and Cervonema deltensis n. sp. (Chromadorida: Comesomatidae), with observations on morphology and systematics. Invert. Biol. 114: 119–138.Google Scholar
  4. Jensen, P. & S. A. Gerlach, 1977. Three new Nematode-Comesomatidae from Bermuda. Ophelia 16: 59–76.Google Scholar
  5. Jensen, P., 1979. Revision of Comesomatidae (Nematoda). Zool. Scr. 8: 81–105.CrossRefGoogle Scholar
  6. Jensen, P., 1992. Description of the marine nematode Hopperia australis n. sp. (Comesomatidae) from mangroves in Darwin, Australia, with a pictorial key to Hopperia species. Cah. Biol. Mar. 33: 495–500.Google Scholar
  7. Muthumbi, A.W., et al., 1997. Deep-sea nematodes from the Indian Ocean: new and known species of the family Comesomatidae. Hydrobiologia 346: 25–57.CrossRefGoogle Scholar
  8. Warwick, R. M., 1973. Freeliving marine nematodes from the Indian Ocean. Bull. Br. Mus. nat. Hist. (Zool.). 25: 87–117.Google Scholar
  9. Wieser, W., 1954. Free-living marine nematodes. II. Chromadoroidea. Reports of the Lund University Chile Expedition 1948–49. Acta Univ. N.F., Avd. 2, 50: 148.Google Scholar
  10. Zhang, Z. N., 1992. Two new species of the Genus Dorylaimopsis Ditlevsen, 1918 (Nematoda: Adenophora: Comesomatidae) from the Bohai Sea, China. Chin. J. Oceanol. Limnol. 10: 32–39.Google Scholar

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© Kluwer Academic Publishers 1998

Authors and Affiliations

  • Guotong Chen
  • Magda Vincx

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