Thalassomonhystera

Thalassomonhystera	Contents	Rev: 03/31/2025
	Classification	Biology and Ecology
	Morphology and Anatomy	Life Cycle
Return to Thalassomonhystera Menu		Ecosystem Functions and Services
	Distribution	Management
Return to Monhysteridae Menu	Feeding	References
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Classification:

Chromadorea
Chromadoria
Monhysterida: Monhysterina
Monhysteroidea
Monhysteridae: Diplolaimellinae
Thalassomonhystera Jacons, 1987

Synonyms:

Members of the subfamily Diplolaimellinae of the Monhysteridae are characterized by a double buccal cavity at some point during their juvenile or adult stages, while those in the other subfamily, the Monhysterinae, have a single tapered buccal cavity.

Body slender,
Cuticle apparently smooth and striations indistinct
Short somatic setae distributed throughout body
Tsail conico-cylindrical

Females:

Monodelphic, prodelphic, ovary outstretched, right of intestine, extending to level between pharyngeal end and posterior end of ventral gland.

Ref: Kito and Aryuthaka, 1998

Thalassomonhystera siamensis Male A. Head; B. Anterior region; C. Posterior region with some ejaculatory glands; D. Posterior region. Female E. Head; F. Posterior region; G. Tail. Right side view except A, D, G in left side view
Drawings from Kito and Aryuthaka, 1998

Males:

Monorchic, testis outstretched
Spicules paired, arcuate
Gubernaculum complex

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

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Distribution:

Free-living marine nematodes, including in sea-water-fed shrimp culture pondes in Thailand.

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Feeding:

Bacterial and probably epistrate feeders.

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Biology and Ecology:

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:

Heip, C., Vincx, M., Vranken, G. 1985. The ecology of marine nematodes. Oceanography and marine biology. Ann Rev Lond 23:399-489

Jacobs, L.J. 1987. A checklist of the Monhysteridae (Nematoda, Monhysterida). Rand Afrikaans University, Johannesburg, 186 pp.

Kito, K., Aryuthaka, C. 1998. Free-living marine nematodes of shrimp culture ponds in Thailand. I. New species of the genera Diplolaimella and Thalassomonhystera (Monhysteridae) and Theristus (Xyalidae). Hydrobioloia 379:123-133

Tchesunov, A.V. 2015. Free-living nematode species (Nematoda) in hydrothermal sites of the North Mid-Atlantic Ridge. Helgoland Marine Research 69:343-384.