Euchromadora

Euchromadora	Contents	Rev: 03/08/2026
	Classification	Biology and Ecology
	Morphology and Anatomy	Life Cycle
Return to Euchromadora Menu		Ecosystem Functions and Services
	Distribution	Management
Return to Chromadoridae Menu	Feeding	References
	Go to Nemaplex Main Menu	Go to Dictionary of Terminology

Classification:

Chromadorea
Chromadoria
Chromadorida
Chromadoridae: Euchromadorinae
Euchromadora De Man, 1886

Type species of genus: Euchromadora vulgaris De Man, 1886

Synonyms:

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Morphology and Anatomy:

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

Females:

Didelphic-amphidelphic, ovaries reflexed

Ref: Tchesunov, 2013

Atrochromadora tereroa (Left): A) male pharynx region; B) female anterior; C) spicules and gubernaculum
Scale bar: A = 25 um, B = 20 um, C =23 um.

Euchromaodra rebeccae (Right): D) female pharynx region; E) male anterior; F) female anterior; (J) tip of tail. Scale bar: D = 100 um, E and F = 50 um

Drawings adapted from Leduc, 2025

Males:

Monorchic
Spicules simple
Gubernaculum with two central pieces and two L-shaped lateral guiding pieces (telamon).

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

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Distribution:

Marine habitats often associated with maxcroalgae and kelp holdfasts (Leduc, 2025)

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Feeding:

Food Sources and Feeding strategies for the genus Euchromadora

Epistrate microbial feeders. Euchromadora species are reported living on macroalgae, for example E. ezoensis on subtidal Sargassum confusum (Leduc, 2025).

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Biology and Ecology:

The ability to inhabit macroalgae likely facilitates long distance dispersal via drifting macroalgal fragments (Leduc, 2025).

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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:

Leduc, D. 2025. New and known free-living nematode species (Nematoda: Chromadorea) from offshore tsunami monitoring buoys in the Southwest Pacific Ocean. PeerJ DOI 10.7717/peerj.19789

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

Euchromadora

Copyright © 1999 by Howard Ferris. Revised: March 08, 2026.

Copyright © 1999 by Howard Ferris.
Revised: March 08, 2026.