Calolaimus

  

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Rev 04/28/2025

  Classification Biology and Ecology
Morphology and Anatomy Life Cycle
Return to Calolaimus Menu Ecosystem Functions and Services
Distribution Management
Return to Mydonomidae Menu Feeding  References
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Classification:

Enoplea
Dorylaimia
 Dorylaimida
Mydonomidae
Calolaiminae
Calolaimus Timm, 1964

Type species of the genus: Calolaimus papillatus Timm, 1964

Synoyms

Galophinema Siddiqi, 1965

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Morphology and Anatomy:

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  • Large nematodes, usually > 4 mm long.
  • Cuticle dorylaimoid.
  • Lip region rounded and continuous with body contour.
  • Lips amalgamated.
  • Odontostyle short, asymmetrical.
  •  Guiding ring very thick, and sclerotized.
  • Odontophore straight.
  • Anterior portion of the esophagus weakly muscular. expanding gradually into a cylindrical bulb which occupies up to 1/3 of total esophagus length.
  • Tail similar in both sexes: elongated to filiform.

Female:

  •  Female genital system didelphic, amphidelphic.
  • Vulva transverse or pore-like.

 

 

 
Calolaimus papillatus. E. Head end of female. F. Vulva and vagina. G. Vulva, ventral.
Drawings from Siddiqi, 1966

Males:  

  • Only reported for one species.
  • Dorylaimid spicules and 8 spaced ventromedian supplements.

Ref: Pena-Santiago (2006).

 

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

Some species terrestrial around plant roots, others reported from freshwater habitats,

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Feeding:

Food Sources and Feeding strategies for the genus Calolaimus
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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:

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

Pena-Santiago, R. 2006. Dorylaimida Part 1. Superfamilies Belondiroidea, Nygolaimoidea and Tylencholaimoidea. Pp 326-391 in  E. Abebe, Istvan Andrassy, W. Traunspurger (eds) Freshwater Nematodes: Ecology and Taxonomy. CABI Publishing.

Siddiqi, M.R. 1966. Studies on the Genera Calolaimus Timm, Galophinema Siddiqi, Qudsianema Jairajpuri, and Utahnema Thorne (Nematoda: Leptoncllidae), with Description of U. gracile n. sp. Proc. Helminthol. Soc. Washington. 33:157-162.

 

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Copyright © 1999 by Howard Ferris.
Revised: April 28, 2025.