Campydora demonstrans




Rev 02/19/2023

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                   Campydora demonstrans Cobb, 1920
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Morphology and Anatomy:


  • Cuticle finely striated.
  • Lip region truncated or offset,
  • Inner labial sensilla papilliform.
  • Outer labial and cephalic sensilla usually papilliform.
  • Amphids with slit-like or oval aperture, stirrup-shaped fovea.
  • Stoma tuibular or conoid with a single tooth.
  • Esophagus anteriorly cylindrical with a distinct basal bulb that lacks valves.
  • Female:

    • Didelphic, amphidelphic or mondelphic prodelphic.
    • Ovaries reflexed or outstretched.


    Ref: Holovachov, 2019; Sturhan, 2010.


  • Monorchic, testis outstretched.
  • Spicules paired, symmetrical.
  • Caudal glands and spinneret present or absent.
Males of C. demonstrans are rarely found but seem to have a well-developed reproductive system and sperm have been reported in the uteri of several females..


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


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The type locality of Campydora demonstrans is in Greece where Cobb (1920) reported it from around the roots of citrus trees. The nematode appears to be widely dispersed in Europe and is reported from a few locations in Asia. The nematode has also been reported from a few locations in the central USA (Sturhan, 2010).

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Food habits are uncertain. However, the nematode has a narrow, tubular stoma that may be an adaptation to bacterial-feeding and elimination of larger structures. Structures that appeared to be bacterials, and larger granulated bodies, were onbserved in the intestins of specimens from Vietnam.  The posetrior part of the esophagus appears to function as a pumping structure (Sturhan, 2010).

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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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Holovachov, O., Bsotrom, S., Nadler, S.A., De Ley, P. 2009. Systematics and phylogenetic position of the genus Tricirronema Siddiqi, 1993 (Cephalobomorpha). J. Nematode Morphol. Syst., 12: 133-143.

Holovachov, O. 2019. Campydoroides manautei gen. et sp. nov. from New Caledonia and a reappraisal of the suborder Campydorina (Nematoda). European Journal of Taxonomy. 518 DOI:

Sturhan, D. 2010. On the distribution, ecology and biology of Campydora demonstrans Cobb, 1920 (Enoplida, Campydoridae). Nematology Mediterranea 38:79-82.

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Copyright 1999 by Howard Ferris.
Revised: February 19, 2023.