Synonchium

Synonchium	Contents	Rev: 02/22/2026
	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 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.

Females:

Didelphic, amphidelphic, ovary branches reflexed antidromously.

Body size range for the species of this genus in the database - Click:

Males:

Diorchic, with outstretched anterior testis and reflexed posterior testis.
Preanal supplementary organs inconspicuous or absent.
No gubernaculum.

Ref: Leduc, 2013; Tchesunov, 2013

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Distribution:

Predatory marine nematodes.

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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:

For Ecophysiological Parameters for this genus, click

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Ecosystem Functions and Services:

Predator.

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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.

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