Amphidelus

  

Contents

  

Rev: 06/16/2023

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

Enoplea
     Enoplia
        Enoplida
              Alaimina
                    Amphidelidae

             Amphidelus Thorne, 1939

    Synonyms:

 Etymology:  name refers to readily discernible amphid apertures.    

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Morphology and Anatomy:

 

Females:

  • Slender body ranging from 0.9 to 4.2 mm.
  • Cuticle smooth.
  • Head rounded and not offset from body contour.
  • Lips fused; labial papillae small but visible.
  • Anterior sensillae a ring of 6 minute inner labial pits surrounding mouth opening, a circle of more obvious outer labial pits and a circle of 4 cephalic pits which are difficult to see.
  • Mouth opening inconspicuous; stoma very narrow
  • Amphids pocket-shaped with slit or oval aperture; < 2 head diameters behind head.
  • Esophagus gradually widening with 7 gland nuclei in posterior region.
  • Excretory duct, after leaving the excretory cell, splits into two canaliculi which merge  into a single duct before opening through a single excretory pore.
  • Female gonad mostly amphidelphic but in some species prodelphic or opisthodelphic.
  • Vulva lips open; vagina swollen.
  • Tail elongate conoid to filiform; c' = 3 - 22.

 

   
   

Males:  

  • Rare
  • Monorchic
  • Spicules short and straight.
  • Gubernaculum absent.
  • 2 to 5 ventromedian supplements.
     

Andrássy, 2009; Clausi and Vinciguerra, 2003
Amphidelidae (L=1.3 mm); Domes Gardens, UC Davis.  Photos by Anna Ruth Crittenden Amphidelidae; esophageal region and amphid apertures
 

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

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Feeding:

Bacterivores

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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:

Andrássy, I. 2009.  Free-living nematodes of Hungary, III.  Hungarian Natural History Museum.

Clausi, M., Vinciguerra, M.T. 2003. A new nematode species, Brasilaimus lombardoi sp.n. (Actinolaimidae, Dorylaimida) and the male of Amphidelus boa Andrassy, 1968 (Alaimidae, Enoplisa) from Esuador, Nematol. Medit. 31:21-28.

Thorne, G. 1939. A monograph of the nematodes of the superfamily Dorylaimoidea. Capita Zool. 8: 1-263.

 

Copyright © 1999 by Howard Ferris.
Revised: June 16, 2023.