Udonchus		Contents		Rev: 10/16/2024
		Classification		Biology and Ecology
		Morphology and Anatomy		Life Cycle
Return to Udonchus Menu				Ecosystem Functions and Services
		Distribution		Management
Return to Rhabdolaimidae Menu		Feeding		References
		Go to Nemaplex Main Menu		Go to Dictionary of Terminology

Classification:

Chromadorea

  Chromadoria

       Plectida

Leptolaimoidea

Rhabdolaimidae

Monochromadorinae

       

Udonchus Cobb, 1913

Type species of the genus: Udonchus tenuicaudatus Cobb, 1913

    Synonyms:
      

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Morphology and Anatomy:

•  Parthenogenetic with oviparous females;
• Cuticle smooth without longitudinal lines, punctations or somatic setae;
• Lip region conical, rounded or truncate; lips fused.
• Stoma tubular to narrow funnel-shaped; cheilostom with rugae; metastegostomal walls with an anteriorly-placed, small, setose, upwardly directed dorsal denticle and two subventral denticles;
• Cardia with rounded to elongate gland cells arranged compactly
• Female genital system mono-prodelphic with antidromously reflexed ovary; oocytes with prominent nuclei;
• Vagina usually anteriorly directed with simple or thickened walls;
• Rectum with a glandular cell associated to its distal wall;
• Tail elongate, gradually tapering towards a hemispheroid or clavate end with an associated terminal spinneret; caudal glands usually distinct (Tahseen et al., 2012).

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Distribution:

Described from freshwater habitats, including hot springs.

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Feeding:

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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:

Andrassy, I. 2005. Free-living Nematodes of Hungary, I (Nematoda errantia). Pedozoologica Hungarica 3. Hungarian Natural History Museum, Budapest, Hungary. 518p.

Cobb, N. A. 1913. New nematode genera found inhabiting freshwater and non-brackish soils. Journal of the Washington Academy of Sciences 3:432-444.

Ocana, A. 1991. A redesctiption of two nematode species found in hot springs. Nematol. Medit. 19:173-175.

Tahseen, Q., Sultana, R., Khan, R., Hussain, R. 2012. A New Genus and Species of the Family Rhabdolaimidae (Nematoda), with Descriptions of Two Known species and Taxonomic Discussion. J. Nemsatology 44:302-312.

Copyright © 1999 by Howard Ferris.
Revised: October 16, 2024.