Cephalenchus driekieae

 

Contents

 

Rev 05/03/2022

  Classification Hosts
Morphology and Anatomy Life Cycle
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Distribution Management
Return to Tylenchidae Menu Feeding  References
   

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Classification:

Tylenchida  
  Tylenchina  
   Tylenchoidea 
    Tylenchidae 
     Tylodorinae
Cephalenchus driekieae  Rashidifard, Du Preez, Abolafia & Pedram 2020
Synonyms: 

 

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Morphology and Anatomy:

 

Molecular phylogenetic analyses using the partial small and large subunit ribosomal DNA gene (SSU and LSU rDNA D2-D3) sequencesindicate that the species clusters with other Cephalenchus spp. in both SSU and LSU trees, and is consistents with the  monophyly of the genus.

Female:

  • Body tapering slightly toward s then with long filiform tail.

  • Cuticle thin and coarsely annulated, annuli .

  •  Lateral fields with four longitudinal incisures, the outer ones ending at proximal part of tail.

  • Cephalic region rounded, framework wesakly sclerotized, separated from the rest of the body by a constrictionn.

  •  Amphidial openings dorso-ventrally oriented on labial disc.

  • Four cephalic papillae on the corners of the labial disc. Oral disc small and rounded.

  • Stylet with a conus ca. 45% of its total length, a cylindrical shaft, and anchor-shaped knobs.

  • DGO close behind stylet knobs.

  • Pharynx with wide, short, muscular procorpus, about one stylet length.

  • Metacorpus pyriform, a small central valve.

  • Iisthmus remarkably narrow, slender

  • Pharyngeal glands with long dorsal overlap over the intestine,

  • Nerve ring at around middle isthmus, at about 70% of the neck length.

  •  Excretory pore at anterior half of the pharyngeal glands, or at ca 90% of the neck length.

  • Hemizonid discernible, slightly anterior to the excretory pore.

  •  Rectum about as long as anal body width. Anus distinctive.

  • Reproductive system monodelphic-prodelphic,ovary outstretched, and oocytes behind the germination zone in single row;

  • Sspermatheca spherical and empty; uterus with tubular distal part (uterine crustaformeria) and quadricolumellate,

  • Postuterine sacspacious, about as long as vulval body width,

  • Vagina perpendicular to body axis, 31 to 43% of corresponding body width long

  • Vlva a small transverse slit and vulval flaps visibly very small.

  • Tail elongated and filiform, its tip finely rounded.


Male:

  • Not found

Ref: Rashidifard et al., 2020

Refer to subfamily diagnosis (Tylodorinae)

Reported median body size for this species (Length mm; width micrometers; weight micrograms) - Click:

 
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Distribution:

Collected from soil around grass roots in South Africa.

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Economic Importance:

 

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Feeding:

 

 

 

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Hosts:

 

 

For an extensive host range list for this species, click

 

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Life Cycle:

 

Ecophysiological Parameters:

For Ecophysiological Parameters for this species, click If species level data are not available, click for genus level parameters

 

 

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Damage:

 

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Management:

For plants reported to have some level of resistance to this species, click

 

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References:

Rashidifard, M., Du Preez, G., Abolafia, J., Peram, M. 2020. Cephalenchus driekieae n. sp. (Nematoda: Tylenchidae) from South Africa, a new member of the genus with a long pharyngeal overlap. J. Nematology 52:| DOI: 10.21307/jofnem-2020-031

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Copyright © 1999 by Howard Ferris.
Revised: May 03, 2022.