Sychnotylenchus

 

Contents

 

Rev 10/07/2024

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

      Tylenchida
       Tylenchina
        Tylenchoidea
         Anguinidae

         Sychnotylenchus Ruhm, 1956

Type species of the genus: Sychnotylenchus intricati Ruhm, 1956

    Synonyms:
      Neoditylenchus (Meyl, 1961)

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Morphology and Anatomy:

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General morphology of Sychnotylenchus is similar to that of  the Anguinidae except for the shorter male and female tails.
  • Labial framework six-sectored with the six sectors equal or lateral sectors narrower than subdorsal and sub-ventral ones.  
  • Esophagus with procorpus generally wide and separated from median bulb by a constriction, rarely thin and without a constriction.  
  • Median bulb with valve, well-defined, fusiform to spherical.  
  • Esophageal glands short, pyriform to elongate, wide.  
  • Position of excretory pore variable from anterior to median bulb to opposite posterior end of glands.  
  • Females:  tail small, cylindroid to broadly rounded end.  
  • Oocytes in one/two rows.  
  • Columned uterus four rows of more than four cells (seven to fourteen cells), post-uterine sac present.  

Males:

[Ref: Fortuner and Maggenti,  (1987)]


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

Wood-inhabiting nematodes often as part of nematode-insect-fungi assocoations in declining forests (Rhyss et al., 2024)..

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Economic Importance:

 

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Feeding:

 

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Hosts:

The biology of Sychnotylenchus the type genus of Sychnotylenchidae is different from that of the other Anguinidae in that the species in this genus are always found associated with bark beetles.  However, they are not insect parasites but feed on the fungi that grow in the frass of the beetles.     

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

Usually reported from leaf and woody tissues rather that from soil under the host plant.

For Ecophysiological Parameters for this genus, click 
 
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Damage:

 

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Management:

 

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References:

Fortuner, R. and Maggenti, A.R. 1987.. A reappraisal of Tylenchina (Nemata). 4. The family Anguinidae Nicoll 1935 (1926). Revue de Nematologie 10:163-176.

Ruhm, W. 1956. Die Nematoden der Ipiden. Parasitologische SchriftenReihe 6:1-435.

Ryss, A.Y., Chalkin, A.A. Subbotin, S.A. 2024. Sychnotylenchus kulinichi sp. n. (Nematoda: Anguinoidea) from the Primorsky Krai of Russia with a tabular key to the genus Sychnotylenchus Ruhm, 1956. Nematology DOI:10.1163/15685411-bia10358

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Copyright © 1999 by Howard Ferris.
Revised: October 07, 2024.