Cygnonema verum




Rev: 02/22/2024

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       Cygnonema verum Raes, Decraemer & Vanreusel, 2009
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Morphology and Anatomy:

Cygnonema verum (adapted from Raes et al., 2009)



  • Cuticle coarsely striated, covered with mucus and rod-shaped bacteria.
  • Head capsule well developed.
  • 6 papilliform inner labial sensilla, 6 setiform outer labial sensilla, 4 setiform cephalic sensilla
  • Two circles of 8 subcephalic setae.
  • Somatic setae along body
  • Amphid fovea pore-like.
  • Pharynx muscular, mainl cylindrical, with small pyriform terminal bulb.
  • Conspicuous, elongate cardia.
  • Tail conical with spinneret


  • Didelphic, ovaries antidromously reflexed, both genital branches to the left of intestine.


  • S-shaped body, enlarged in regions of pharynx and reproductive system.

  • Monorchic,

  • Spicules paired, curved

  • Gubernaculum with or without dorsocaudal apophysis.

  • Conspicuous precloacal supplements at level of pharynx.


Ref:Raes et al., 2009


Reported median body size for this species (Length mm; width micrometers; weight micrograms) - Click:


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Described from dead coldwater coral in the North Atlantic Ocean.

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Biology and Ecology:


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Life Cycle:


Ecophysiological Parameters:

For Ecophysiological Parameters for this species, click If species level data are not available, click for genus level parameters

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Ecosystem Functions and Services:


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Allen MW, Noffsinger EM (1978) A revision of the marine nematodes of the superfamily Draconematoidea Filipjev, 1918 (Nematoda: Draconematina). Univ Calif Publs Zool 109: 1–133

Decraemer W, Gourbault N, Backeljau T (1997) Marine nematodes of the family Draconematidae (Nemata): a synopsis with phylogenetic relationships. Hydrobiologia 357: 185–202

Raes, M., Decraemer, W., Vanreusel, A. 2009. Draconematidae (Nematoda) from cold-water corals in the PorcupineSeabight: The genus  Cygnonema  Allen & Noffsinger, 1978. Organisms, Diversity, Evolution  37:e1-e20.


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Copyright 1999 by Howard Ferris.
Revised: February 22, 2024.