Rev 12/09/2022

  Classification Biology and Ecology
Morphology and Anatomy Life Cycle
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Dorylaimoides Thorne and Swanger, 1935
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Morphology and Anatomy:


  • Slender nematodes of medium size, 1-2 mm long.
  • Cuticle dorylaimoid: outer layer thin and with fine transverse striations; inner layer thicker.
  • Odontostyle asymmetrical, ventral side shorter than the dorsal one and dorsally bent anteriorly.
  • Odontophore usually arcuate or angular.
  • Guiding ring simple
  • Esophagus slender and weakly muscular in anterior region, expanding abruptly into a cylindrical basal bulb which occupies 1/4 to 1/3 of total esophagus length.
  •  Tail similar in both sexes: long and filiform to short and rounded.

  • didelphic or mono-opisthodelphic.
  • Vulva a transverse slit.




  • Diorchic
  • Spicules dorylaimid.
  • From 1 to 12 evenly spaced ventromedian supplements, usually close to the spicules,

Ref: Pena-Santiago, 2006; Pena-Santiago and Peralta, 1997

Body size range for the species of this genus in the database - Click:
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Considered basically a terrestrial genus but about 1/4 of the species have been reported from freshwater habitats.

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 Classified as an omnivore (Yeates et al., 1993).    

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Biology and Ecology:

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Life Cycle:

For Ecophysiological Parameters for this genus, click 
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Ecosystem Functions and Services:


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Goodey, T and J.B. Goodey, 1963. Soil and Freshwater Nematodes. Methuen. London

Pena-Santiago, R. 2006. Dorylaimida Part 1. Superfamilies Belondiroidea, Nygolaimoidea and Tylencholaimoidea. Pp 326-391 in  E. Abebe, Istvan Andrassy, W. Traunspurger (eds) Freshwater Nematodes: Ecology and Taxonomy. CABI Publishing.

Pena-Santiago, R. and Peralta, M. 1997. The genus Dorylaimoides Thorne & Swanger, 1936 (Nematoda: Dorylaimida). 1. Taxonoly and variability. Fund. Appl. Nematol. 20:243-251..

Wu, W-J., Xu, C-L., Xie, H., Wang, D-W. 2019. Three new species, one new genus and subfamily of Dorylaimida (de man, 1876) Pearse, 1942, and revisions of the families Tylencholaimellidae Jairajpuri, 1964 and Mydonomidae Thorne, 1964 (Nematoda, Dorylaimida). PeerJ 7:e7541

Yeates, G.W., T. Bongers, R. G. M. De Goede, D. W. Freckman, and S. S. Georgieva. 1993. Feeding habits in soil nematode families and genera—An outline for soil ecologists. Journal of Nematology 25:315-331.

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Copyright © 1999 by Howard Ferris.
Revised: December 09, 2022.