Rhinema		Contents		Rev 08/24/2026
		Classification		Biology and Ecology
		Morphology and Anatomy		Life Cycle
Return to Rhinema Menu				Ecosystem Functions and Services
		Distribution		Management
Return to Monoposthiidae Menu		Feeding		References
		Go to Nemaplex Main Menu		Go to Dictionary of Terminology

 Classification:

Chromadorea

  Chromadoria

   Desmodorida

Desmodorina

             Monoposthioidea

   Monoposthiidae

    Rhinema Cobb, 1920

Type species of the genus: Rhinema retrorsum Cobb, 1920

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Morphology and Anatomy:

• Thick coarsely annulated cuticle; annules slightly overlapping to anterior in anterior half of body, overlapping to posterior in posterior half.

• Longitudinal rows of cuticular notches and ridges.

• Longitudinal alae throughout body

• Anterior sensilla in 6+6+4 asrrangement, labial circles papilliform; cephalic circle setiform.

• Amphidial fovea circular

• Buccal cavity deep with large dorsal tooth and two small ventrosublateral teeth

• Tail conical


Marine.

Males:

• Monorchic or diorchic
• Spicules and gubernaculum present.

Females:

• Didelphic-amphidelphic, ovaries outstretched
• Vulva near mid-body

Ref: Tchesunov, 2013; Huang and Guo, 2022

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Distribution:

Free-living marine nematodes. Reported from sublittoral muddy sediment.

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Feeding:

Food Sources and Feeding strategies for the genus Rhinema

Probably marine micro-organisms in epistrate and sediment.

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Biology and Ecology:

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Life Cycle:

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Ecosystem Functions and Services:

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Management:

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References:

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For more information about nematodes, Go to Nemaplex Main Menu.

Revised by Howard Ferris.
Revised: August 24, 2026.