, Volume 427, Issue 1, pp 27–49 | Cite as

Nematodes from the Strait of Magellan and the Beagle Channel (Chile): the genera Cervonema and Laimella (Comesomatidae: Nematoda)

  • Guotong Chen
  • Magda VincxEmail author


Five species of Cervonema and four species of Laimella are described from the Strait of Magellan and the Beagle Channel, Chile, six species of which are new to science. Cervonema chilensisn. sp. and Cervonema hermanin. sp. are separated from other known species of Cervonema by a short cervical region (less than one head diameter from the front end to the anterior border of the amphids). Cervonema chilensisn. sp. is characterised by a tail length of 5 anal diameters with posterior half filiform; Cervonema hermani n. sp. is characterised by a tail length of 6–9 anal diameter and posterior part (75%) cylindrical. Cervonema shiaen. sp. is characterised by the cephalic seta 4 μm long, amphids 9–10 μm in diameter; spicules 16 μm long and 0.8–0.9 abd; tail 4.7–5.4 anal diameter and 50% posterior part filiform; 4–5 minute precloacal supplements. Laimella subterminatan. sp. is characterised by the subterminal position of the buccal cavity which separates it from the other species of the genus. Laimella annaen. sp. is characterised by the head diameter 9–11 μm, cephalic setae and external labial setae 9 + 5 μm long, respectively, amphids 7 μm in diameter; spicules 28–30 μm long; tail 14–17 anal diameter and posterior part (75%) filiform; 5 precloacal supplements. Laimella sandraen. sp. is very close to Laimella annaen.sp. in having similar cephalic sensilla, amphids and spicules. Laimella sandraen. sp., however, can be separated from L.annaen. sp. by the shape of head and the structure of sperm cells, the total body length and the cylindrical part of tail. Cervonema papillatum Jensen, 1988, C. tenuicauda (Stekhoven, 1950) and L. longicauda Cobb, 1920 are found in this area as well. The key of all known species of Cervonemaand Laimellais presented.

taxonomy marine nematodes Cervonema Laimella the Strait of Magellan Chile 


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  1. Arntz, W. & M. Gorny, 1996. Cruise report of the Joint Chilean-German-Italian Magellan 'Victor Hensen' Campaign in 1994. Ber Polarforsch 190: 113 pp.Google Scholar
  2. Chen, G. & M. Vincx, 1998. Nematodes from the Strait of Magellan and the Beagle Channel (Chile): Description of four new species of the Comesomatidae. Hydrobiologia 379: 97–110.Google Scholar
  3. Cobb. N. A., 1920. One hundred new nemas (Type species of 100 genera). Contr. Sci. Nematol. 9: 217–343.Google Scholar
  4. Gerlach, S. A. & F. Riemann, 1973. The Bremerhaven checklist of aquatic nematodes. A catalogue of Nematoda Adenophorea excluding the Dorylaimida. Veröff. Inst. Meeresforsch. Bremerh. Supplement 4: 1–404.Google Scholar
  5. Gourbault, N., 1980. Nématodes abyssaux (Campagne Walda du N/O 'J. Charcot'). II. Espèces et genres nouveaux de Comesomatidae. Bull. Mus. Natn. Hist. Nat. Paris, 3: 737–749.Google Scholar
  6. Hopper, B. E., 1967. Free-living marine nematodes from Biscayne Bay, Florida, I. Comesomatidae: the male of Laimella longicauda Cobb, 1920, and description of Actarjania n. g. Mar. Biol. 1 (2): 140–144.Google Scholar
  7. Jensen, P., 1979. Revision of Comesomatidae (Nematoda). Zool. Scr. 8: 81–105.Google Scholar
  8. Jensen, P., 1988. Four new nematode species, abundant in the deepsea benthos of the Norwegian Sea. Sarsia, 73: 149–155.Google Scholar
  9. Muthumbi, A. W., K. Soetaert & M. Vincx, 1997. Deep-sea nematodes from the Indian Ocean: new and known species of the family Comesomatidae. Hydrobiologia 346: 25–57.Google Scholar
  10. Stekhoven, J. H. S., 1950. The freeliving marine nema of the Mediterranean. I. The Bay of Villefranche. Mém. Inst. Sci. Nat. Belg. 2 (37): 1–220.Google Scholar
  11. Vitiello, P., 1970. Nématodes libres marins des vases profonds du golfe du Lion. II. Chromadorida. Téthys 2 (2): 449–550.Google Scholar
  12. Vitiello, P., 1971. Nematodes nouveaux des vases terrigènes cotières des côtes provencales. Téthys 2 (4) 1970 (1971): 859–875.Google Scholar
  13. Ward, A. B., 1974. Three new species of free-living marine nematodes from sublittoral sediments in Liverpool Bay. Mar. Biol. 24: 93–96.Google Scholar
  14. 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 (16): 1–148.Google Scholar

Copyright information

© Kluwer Academic Publishers 2000

Authors and Affiliations

  1. 1.Department of Biology, Marine Biology SectionUniversity of GhentGentBelgium
  2. 2.Department of Biology, Marine Biology SectionUniversity of GhentGentBelgium

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