Skip to main content Accessibility help

Four new species of Desmodora (Nematoda) from the deep south-east Atlantic, and a case of intersexuality in Desmodoridae

  • Juliana da Rocha Moura (a1), Maria Cristina da Silva (a1) and André Morgado Esteves (a1)


Four new species of the genus Desmodora are described from the South Atlantic off the south-eastern coast of the State of Rio de Janeiro, Brazil. Desmodora porosum sp. nov. is characterized by sexual dimorphism in the shape of the amphids, which are closed loop-shaped in males, and multispiral amphids in females. A case of intersexuality was found in the species, with a functional female gonad. Desmodora profundum sp. nov. is characterized by filiform spicules with a capitulum, buccal cavity with one dorsal and one small ventral tooth, tail cylindrical with a terminal spinneret, and wider rings in the neck region than on the rest of the body. Desmodora veronicae sp. nov. possesses cryptospiral amphids, a buccal cavity with one dorsal tooth and two smaller ventral teeth, 14 tubular pre-cloacal supplements, two ventral cuticular protruberances on the tail, and curved spicules with a capitulum and velum. Desmodora curvatum sp. nov. has the cuticle finely striated, without somatic setae, multispiral amphids, and a gubernaculum without apophysis, curved dorsally with the tip directed toward the end of the body.


Corresponding author

Correspondence should be addressed to: J. Moura, Universidade Federal de Pernambuco, Avenida Professor Moraes Rego, s/n, Departamento de Zoologia, Cidade Universitária, Recife—Pernambuco, Brazil50670-901. email:


Hide All
Allgén, C. (1953) Über einen Fall von Hermaphroditismus in der Gattung Desmodora De Man (Chromadoroidea, Nematodes). Zoologischer Anzeiger 151(5/6), 9598.
Bird, A.F. and Bird, J. (1991) The structure of nematodes. San Diego, CA: Academic Press.
Brandt, A., De Broyer, C., De Mesel, I., Ellingsen, K.E., Gooday, A.J., Hilbig, B., Linse, K., Thomson, M.R.A. and Tyler, P.A. (2007) The biodiversity of the deep Southern Ocean benthos. Philosophical Transactions of the Royal Society, B 362, 3966.
Cobb, N.A. (1920) One hundred new nemas. Contributions to a Science of Nematology 9, 217234.
Coomans, A. (1979) A proposal for a more precise terminology of the body regions of a nematode. Annales de la Société Royale Zoologique de Belgique 108, 115117.
De Bovée, F. (1975) Dorylaimopsis mediterranea Grimaldi de Zio (Nematoda Comesomatidae). Description d'une forme intersexuée. Vie et Milieu 25, 227233.
Decraemer, W. and Smol, N. (2006) Orders Chromadorida, Desmodorida and Desmoscolecida. In Eyualem-Abebe, Andrássy I. and Traunspurger, W. (eds) Freshwater nematodes: ecology & taxonomy. Wallingford: CABI Publishing, pp. 497573.
De Ley, P. and Blaxter, M.L. (2002) Systematic position and phylogeny. In Lee, D.L. (ed.) The biology of nematodes. London: Taylor & Francis, pp. 130.
De Ley, P., Decraemer, W. and Eyualem-Abebe (2006) Introduction: summary of present knowledge and research addressing the ecology and taxonomy of freshwater nematodes. In Eyualem-Abebe, Andrássy I. and Traunspurger, W. (eds) Freshwater nematodes: ecology and taxonomy. Wallingford: CABI Publishing, pp. 330.
De Man, J.G. (1880) Die einheimischen, frei in der reinen Erde und im süßen Wasser lebenden Nematoden. Vorläufiger Bericht und deskriptiv-systematischer Teil. Tijdschrift der Nederlandsche Dierkundig Vereeniging 5, 1104.
De Man, J.G. (1889) Troisième note sur les nématodes libres de la mer du Nord et de La Manche. Mémoires de la Société Zoologique de France 2, 182216.
Deprez, T., et al. (eds.) (2005) NeMys. Available at: (version 3/2012). Accessed 15 February 2012.
Fonsêca-Genevois, V., Smol, N., Decraemer, W. and Venekey, V. (2009) Bernardius lineatus gen. n., sp. nov. (Enoplida: Enchelidiidae), a remarkable nematode with ornamented cuticle from a Brazilian tropical sandy beach. Nematology 11(2), 275287.
Gagarin, V.G. and Nguyen, Vu Thanh (2003) Two new species of free-living nematodes from the Cau River (Vietnam). Zoologichesky Zhurnal 82, 14181425.
Gagarin, V.G. and Nguyen, Vu Thanh (2010) Three new species of free-living marine nematodes of the order Desmodorida (Nematoda) from Vietnam. Zoologichesky Zhurnal 89, 398406.
Gerlach, S.A. (1963) Freilebende Meeresnematoden von den Malediven II. Kieler Meeresforschungen 19, 67103.
Gourbault, N. and Vincx, M. (1990) Chomadoridae (Nematoda) from Guadeloupe and Polynesia with evidence of intersexuality. Zoologica Scripta 19, 3137.
Hopper, B.E. (1961) Marine nematodes from the coast line of the Gulf of Mexico. Canadian Journal of Zoology 39, 183199.
Ingels, J., Vanhove, S., De Mese, I. and Vanreusel, A. (2006) The biodiversity and biogeography of the free-living nematode genera Desmodora and Desmodorella (family Desmodoridae) at both sides of the Scotia Arc. Polar Biology 29, 936949.
Inglis, W.G. (1963) New marine nematodes from off the coast of South Africa. Bulletin of the British Museum (Zoology) 10, 529552.
Lorenzen, S. (1981) Entwurf eines phylogenetischen Systems der freilebenden Nematoden Veröffentlichungen des Institut für Meeresforschungen in Bremerhaven Supplement 7, 1472.
Miljutin, D.M., Gad, G., Miljutina, M.M., Mokievsky, V.O., Fonsêca-Genevois, V. and Esteves, A.M. (2010) The state of knowledge on deep-sea nematode taxonomy: how many valid species are known down there? Marine Biodiversity 40, 143159.
Miljutina, M.A. and Miljutin, D.M. (2011) Seven new and four known species of the genus Acantholaimus (Nematoda: Chromadoridae) from the abyssal manganese nodule field (Clarion-Clipperton Fracture Zone, North-Eastern Tropical Pacific). Helgoland Marine Research 66, 413462. doi 10.1007/s10152-011-0282-z.
Nigon, V. (1965) Développement et reproduction des Nématodes. In Grassé, P.P. (ed.) Traité de zoologie. IV(2) Némathelminthes (Nématodes). Paris: Masson, Paris, pp. 218386.
Pastor de Ward, C.T. (1988) Nematodes Marinos de la Ría Deseado (Desmodoroidea): Desmodoridae, Draconematidae, Santa Cruz, Argentina. VII. Physis, Buenos Aires (Secc. A) 46, 6172.
Rezende, C.E., Lacerda, L.D., Ovalle, A.R.C., Souza, C.M.M. and Gobo, A.A.R. (2002) The effect of an oil drilling operation on the trace metal concentrations in offshore bottom sediments of the Campos Basin oil field, SE Brazil. Marine Pollution Bulletin 44, 680684.
Seinhorst, J.W. (1959) A rapid method for the transfer of nematodes from fixative to anhydrous glycerin. Nematologica 4, 6769.
Soares-Gomes, A., Abreu, C.M.R.C., Absher, T.M. and Figueiredo, A.A.G. (1999) Abiotic features and the abundance of macrozoobenthos of continental margin sediments of East Brazil. Archive of Fishery and Marine Research 47, 321334.
Soetaert, K. and Heip, C. (1995) Nematode assemblages of deep sea and shelf break sites in the North Atlantic and Mediterranean Sea. Marine Ecology Progress Series 125, 171183.
Steiner, G. (1916) Freilebende Nematoden aus Barentssee. Zoologische Jahrbücher, Abteilung für Systematik 39, 511676.
Tchesunov, A.V. (2008) Three new species of free-living nematodes from the South-East Atlantic Abyss (DIVA I Expedition). Zootaxa 1866, 151174.
Tupeenniemi, T.A. (1997) Descriptions of Eumonhystera borealis n. sp. and Sphaerolaimus accidentalis n. sp., and a redescription of S. gracilis de Man 1876 (Nemata) from Bothnian Bay, Baltic Sea. Journal of Nematology 29, 6581.
Vermeeren, H., Vanreusel, A. and Vanhove, S. (2004) Species distribution within the free-living marine nematode genus Dichromadora in the Weddell Sea and adjacent areas. Deep-Sea Research II 51, 16431664.
Verschelde, D., Gourbault, N. and Vincx, M. (1998) Revision of Desmodora with descriptions of new desmodorids (Nematoda) from hydrothermal vents of the Pacific. Journal of the Marine Biological Association of the United Kingdom 78, 75112.
Verschelde, D., Nicholas, W. and Vincx, M. (2006) A review of the genera Croconema Cobb, 1920 and Pseudochromadora Daday, 1899 (Nematoda, Desmodoroidea): new species from the coasts of Kenya and Australia. Hydrobiologia 571, 1740.
Verschelde, D. and Vincx, M. (1995) Psammonema gen. n. and Pseudochromadora Daday, 1889 (Nematoda, Desmodoridae) from sandy sediments of Gazi, Kenya. Bulletin van het Koninklijk Belgisch Instituut voor Natuurwetenschappen, Biologie 65, 1139.
Warwick, R.M. (1973) Freeliving marine nematodes from the Indian Ocean. Bulletin of the British Museum (Natural History) Zoology 25, 85117.
Wieser, W. (1954) Free-living marine nematodes II. Chromadoroidea. Acta Universitatis Lundensis (NF 2) 50(16), 1148.


Four new species of Desmodora (Nematoda) from the deep south-east Atlantic, and a case of intersexuality in Desmodoridae

  • Juliana da Rocha Moura (a1), Maria Cristina da Silva (a1) and André Morgado Esteves (a1)


Full text views

Total number of HTML views: 0
Total number of PDF views: 0 *
Loading metrics...

Abstract views

Total abstract views: 0 *
Loading metrics...

* Views captured on Cambridge Core between <date>. This data will be updated every 24 hours.

Usage data cannot currently be displayed.