Graphonema

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

Chromadorea
Chromadoria
Chromadorida
Chromadoridae: Euchromadorinae
Graphonema Cobb, 1898

Type species of genus: Graphonema vulgare Cobb, 1898

Synonyms:

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Morphology and Anatomy:

Complex cuticle heterogeneous, with hexagonal or ovoid punctations anteriorly and posteriorly; slimmer markings restricted to the lateral surface over the middle of the body.
Amphidial fovea transversally elliptical without surrounding cuticular fringe.
Four cephalic setae.
Buccal cavity with large, apparently hollow, dorsal tooth, subventral teeth; rows of denticles absent.
No distinct posterior pharyngeal bulb.

Females:

Didelphic-amphidelphic, ovaries reflexed

Ref: Tchesunov, 2013

Males:

Monorchic
Spicules simple
Gubernaculum with prominent hammer- or L-shaped lateral pieces ( telamons).

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

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Distribution:

Marine habitats

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Feeding:

Food Sources and Feeding strategies for the genus Graphonema

Epistrate microbial feeders

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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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Management:

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References:

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

Graphonema

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

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