Dichromadora		Contents		Rev: 03/01/2026
		Classification		Biology and Ecology
		Morphology and Anatomy		Life Cycle
Return to Dichromadora Menu				Ecosystem Functions and Services
		Distribution		Management
Return to Chromadoridae Menu		Feeding		References
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Classification:

Chromadorea

  Chromadoria

   Chromadorida

    Chromadoridae (or Hypodontolaimidae)

 Hypodontolaiminae

       Dichromadora Kreis, 1929

Type species of the genus: Dichromadora cephalata (Steiner, 1916) Kreis, 1929

    Synonyms:
     

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Morphology and Anatomy:

Genus characterized by:

• Homogeneous cuticular ornamentation with 2 to 4 longitudinal rows of puctations in lateral region
• Six outerlabial papillae and 4 cephallic setae in separate circles
• Buccal cavity armed either with a single triangular hollow dorsal tooth or with a larger dorsal tooth and two smaller ventrosublateral teeth; sometimes denticles may be present.
• Amphid foveae oval to loop-shaped
• Pharynx usually not swollen anteriorly; posterior bulb single.

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Distribution:

Mainly marine habitats, a few species in brackish water

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Feeding:

Food Sources and Feeding strategies for the genus Dichromadora

Dichromadora cephalata reported as diatom and algal feeders in estruarine environments (Moens and Vincx, 1997).

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Biology and Ecology:

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Life Cycle:

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Ecosystem Functions and Services:

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Management:

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References:

Bongers, T. De Nematoden van Nederland.

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

Huang, Y. and Zhang, Z.N. (2010): Three new species of Dichromadora (Nematoda:Chromadorida: Chromadoridae) from the Yellow Sea, China, Journal of Natural History, 44:9-10, 545-558

Liang, H., Guo, W., Wang, C. 2024. Two new species of Hypodontolaiminae (Nematoda, Chromadorida, Chromadoridae) from the Yellow Sea with a phylogenetic analysis in the subfamily. Zookeys, 2024: 281-304.  doi: 10.3897/zookeys.1190.113418

Copyright  1999 by Howard Ferris.

Moens, Y. and Vincx, M. 1997. Observations on the feeding ecology of estuarine nematodes. Journal of the Marine Biology Assoc. U.K. 77:211-227.

Muthumbi, A.W., Vincx, M. 1998. Chromadoridae (Chromadorida: Nematoda) from the Indian Ocean: Description of new and known species. Hydrobiologia 364:119-153.

Tchesunov, A.V. 2013. 7.12 Order Chromadorida Chitwood, 1933. In Schmidt-Rheas and de Gruyter, W. Handbook of Zoology.Gastrocticha, Cycloneuralia, Gnatifera. Volume 2: Nematoda

Copyright © 1999 by Howard Ferris.
Revised: March 01, 2026.