Hypodontolaimus

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

Chromadorea
Chromadoria
Chromadorida
Chromadoridae (or Hypodontolaimidae)
Hypodontolaiminae
Hypodontolaimus de Man, 1886

Type species of the genus: Hypodontolaimus inaequalis (Bastian, 1865) de Man, 1886

Synonyms:

Iotadorus Cobb, 1920

Ptycholaimellus Cobb, 1920

Morphology and Anatomy:

The genus can be separated into two groups., one in which males have supplements, the other in which males lack supplements (Andrassy and Gibson, 2006; Pinto and Neres, 2020)

Species of Hypodontolaimus in which males have supplements		Species of Hypodontolaimus in which males lack supplements
H. abyssalis H. antarcticus H. balticus H. dimorphus	H. inaequalis H. marleenae H. setosoides H. setosus	H. angelae H, colesi H. galapagensis H. golikovi H. interruptus H. kiseloevi H. longiseta H. mediterraneus H. obtusicaudatus	H. pilosus H. plurisetus H. pumilio H. punctulatus H. reversus H. schuurmansstekhoveni H. salivagus H. steineri H. ventrapophyses
Cuticle with regular punctations with 2-4 rows of larger punctations in lateral field. Buccal cavity with large S-shaped hollow dorsal tooth and a dorsal apophysis; one or two small subventral teeth. Amphids oval or loop-shaped Pharynx swollen in buccal region to accommodate the dorsal tooth; single posterior bulb single.

Females:

Ref: Andrassy and Gibson, 2006; Pinto and Neres, 2020; Tchesunov, 2013

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

Males:

One group with cup-shaped precloacal supplements, the other without

The genuss is distributed globally; all species are marine inhabitants, inhabiting form brackish waters of coastal regions to depths of the oceans. The representatives of the genus can be divided in two distinct groups: males with supplements and r males without supplements..

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Feeding:

Food Sources and Feeding strategies for the genus Hypodontolaimus

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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:

Andrassy, I. and Gibson, J.A.E. 2006. Nematodes from saline and freshwater lakes of the Vestfold Hills, East Antarctica, including the description of Hypodontolaimus antarcticus sp. n. Polar Biology DOI 10.1007/s00300-006-0224-4

Goodey, T and J.B. Goodey, 1963. Soil and Freshwater Nematodes. Methuen. London

Muthumbi, A.W., Vincx, M. 1998. Chromadoridae (Chromadorida: Nematoda) from the Indian Ocean: Description of new and known species. Hydrobiologia 364:119-153.

Pinto, T.K. and Neres, P.F. 2020. Four new species of free-living nematodes from shallow continental shelf of Portugal. Zootaxa 4722 (1): 001-033.

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