Synonchium		Contents		Rev: 08/20/2026
		Classification		Biology and Ecology
		Morphology and Anatomy		Life Cycle
Return to Synonchium Menu				Ecosystem Functions and Services
		Distribution		Management
Return to Selachinematidae Menu		Feeding		References
		Go to Nemaplex Main Menu		Go to Dictionary of Terminology

Classification:

Chromadorea

  Chromadoria

   Chromadorida

    Selachinematidae

Selachonematinae

       Synonchium Cobb, 1920

Type species of the genus: Synonchium obtusum Cobb, 1920

    Synonyms:
     

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Morphology and Anatomy:

• Cuticle with transversal rows of dots.
• Anterior sensilla papilloid.
• Amphideal fovea spirally coiled, relatively small and transversally oval.
• Anterior stoma chamber cup-shaped and relatively voluminous, with weak rhabdions; posterior stoma chamber provided with three equal mandibles with strong median tooth and weaker flank teeth.
• Tail short, conical.

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Distribution:

Predatory marine nematodes, prevalent in soarse sandy beach environments (Shi and Xu, 2018)..

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Feeding:

Food Sources and Feeding strategies for the genus Synonchium

Voracious predators of other nematodes.

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Biology and Ecology:

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Life Cycle:

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Ecosystem Functions and Services:

Predatory nematodes

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Management:

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References:

Leduc, D.  2013. Two new genera and five new species of Selachinematidae (Nematoda, Chromadorida) from the continental slope of New Zealand.  European Journal of Taxonomy 63: 1-32.

Shi, B.Z., and K.D. Xu. 2018. Two new rapacious nematodes from intertidal sediments, Gammanema magnum sp. nov. and Synonchium caudatubatum sp. nov. (Nematoda, Selachinematidae). European Journal of Taxonomy 405: 1-17.

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

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Revised by Howard Ferris. August 20, 2026.