Harpagonchoides

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

Chromadorea
Chromadoria
Chromadorida
Chromadoridae: Harpagonchinae
Harpagonchoides Platonova & Patin, 1972: Type species of the genus: Harpagonchoides crassus Platonova & Patin, 1972

Synonyms:

Morphology and Anatomy:

Cuticle with homogeneous punctuation; no lateral differentiation.
A circle of six setae within anterior sensilla pattern.
Buccal cavity with three movable triangular-shaped mandibles with anterior solid hooks.
Pharynx enlarged anteriorly around the mandibular apparatus and posteriorly forrming a true bulb.

Females:

didelphic-ampidelphic

Ref: Tchesunov, 2013

Males:

Lacking pre-cloacal supplements

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

Distribution:

Marine nematodes, ectosymbionts of polycheates

Feeding:

Food Sources and Feeding strategies for the genus Harpagonchoides

All the species of subfamily Harpogonchinae have been were collected from sub-antarctic and antarctic polychaete worms, Harpagonchus averincevi and H. similis on the gills of Aglaophamus macroura (Nephtyidae), and Harpagonchoides crassus between parapodia of Hemipodus digitifera (Glyceridae). The nematodes fasten themselves onto body of polychaetes using mandibular hooks.

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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