Isolaimium

 

Contents

 

Rev 03/08/2021

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

Enoplea
       Dorylaimia
           Isolaimiida
   Isolaimiina
             Isolaimioidea
                Isolaimiidae
      Isolaimiinae
             Isolaimium Cobb, 1920
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Morphology and Anatomy:

Characteristics of the genus Isolaimium: 

  • long and very slender; 2-7 mm long

  • cuticle longitudinally striated; may have punctations, most obvious on tail in longitudinal and transverse rows

  • lip region simple, rounded; lips amalgamated

  • three circles of labial sensilla: six round openings surrounded by six outer labial papille and four minute cephalic papillae.

  • amphids apertures very small and pore-like

  • stoma a long sclerotized tube occupying 30% of length of esophageal region; triradiate, thickened walls anteriorly

  • esophagus muscular, cylindrical, slightly widened posteriorly; cardia large and tongue shaped

  • females dioavial, amphidelphic, with ovaries sometimes reflexed; vulva a transverse slit

  • male testes paired

  • male spicules thick, gubemaculum small, thin

  • male with 1-14 ventro-median supplements and sometimes paired preclocacal ventro-median papillae

  • tails in both sexes short, bluntly rounded with pointed tips, sometimes conoid

  • large, paired caudal papillae on male tail; small paired papillae on female tail

  • mainly inhabitants of undisturbed sandy soils

Ref: Andrassy, 1969 Isolaimium nigeriense: anterior body
from Timm, 1969

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

Mainly inhabitants of undisturbed sandy soils. Reported from Europe, Africa and North America.

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Feeding:

Probably bacterial-feeding but may also be carnivores as bristles of oligochaetes reported in intestines of some specimens.

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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. 2009. Free-living Nematodes of Hungary (Nematoda Errantia) Vol. 111. Humgarian Natural History Museum, Budapest. 508p.

Timm, R.W. 1969. The Genus Isolaimium Cobb, 1920 (Order Isolaimida, Isolaimiidae New Family). Journal of Nematology 1:97-106.

 

 

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Copyright  1999 by Howard Ferris.
Revised: March 08, 2021.