Acontylus

 

Contents

  

Rev 09/11/2023

  Classification Hosts
Morphology and Anatomy Life Cycle
Return to Acontylus Menu Economic Importance Damage
Distribution Management
Return to Hoplolaimidae Menu Feeding  References
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Classification:

      Tylenchina
       Tylenchoidea
        Hoplolaimidae
         Rotylenchulinae

          Acontylus Meagher, 1968

Type species of the genus: Acontylus vipriensis Meagher, 1968

    Synonyms:
      None.

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Morphology and Anatomy:

.

Female:

  • Body straight to slightly ventrally arcuate, swollen in the vulval area.  
  • Labial region high, slightly offset, trapezoid in lateral outline.  
  • Lateral field with four lines.  
  • Phasmids at anus level. 
  • Cephalids and caudalid not described.  
  • Tail short, hemispherical. 
  • Labial framework and stylet well developed.  
  • Stylet knobs sloping backwards in the only known species.  
  • Dorsal esophageal gland opening (DEGO) 13 µm from stylet base.  
  • Median bulb strong, rounded.  
  • Anterior genital branch outstretched.  Posterior branch reduced to a post-uterine sac (PUS). 

  

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Males:  

  • Vermiform. 
  • Labial region knob-like, high, rounded, distinctly offset.
  • Stylet, labial framework, and esophagus reduced in size.
  • Caudal alae enveloping tail. 

Juveniles:

  • Tail rounded with a long terminal projection.

          [Ref: Fortuner, (1987).]
 
Body size range for the species of this genus in the database - Click:
 
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Distribution:

Reported from Australia.

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Economic Importance:

 

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Feeding:

Females are semi-endoparasitic; their anterior portion is embedded in the root up to the level of the excretory pore.  

Males and juveniles have not been observed feeding.        

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Hosts:

Acontylus vipriensis is reported from Eucalyptus sp.  

For an extensive host range list for this genus, click
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Life Cycle:

For Ecophysiological Parameters for this genus, click 
 

Eggs are deposited singly in a gelatinous matrix.

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Damage:

 

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Management:

 

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References:

Fortuner, Rev. Nematol. 10(2):219-232 (1987).

Meagher. J. W. 1968. Acontylus vipriensis n. g., n. sp. (Nematoda: Hoplolaimidae) parasitic on Eucalyptus sp. in Australia. Nematologica 14:94-100.

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Copyright © 1999 by Howard Ferris.
Revised: September 11, 2023.