Paraditylenchus   

  

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Rev 11/04/2024

  Classification Hosts
Morphology and Anatomy Life Cycle

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Distribution Management
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Classification:

  Tylenchida
   Tylenchina
    Tylenchoidea
     Anguinidae
      Anguininae

          Paraditylenchus Subbotin & Ryss, 2024

Type species of the genus: Paraditylenchus gallaeformans (Oliveira, Santin, Seni, Dietrich, Salazar, Subbotin, Mundo-Ocampo, Goldenberg & Barreto, 2013) Subbotin & Ryss, 2024


    Synonyms:

Type species transferred from Ditylenchus gallaeformans to Paraditylenchus gallaeformans by Subbotin and Ryss, 2024
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Morphology and Anatomy:

The genus Paraditylenchus is morphologically similar to the genera Ditylenchus and Zeatylenchus. It. differs from Ditylenchus in having a shorter body length for females (0.5-0.7 vs 0.9- 2.2 mm), post-vulval uterine sac length (1.4-1.8 vs more than 3 times longer than the vulval body diam.), and bursa length (peloderan, enveloping tail tip vs leptoderan, not reaching tail tip). Paraditylenchus differs from Zeatylenchus in the female tail terminus (pointed to minutely rounded vs terminus arcuate, offset on dorsal side), spicate bursa length (peloderan vs adanal), number of lateral field incisures (4 vs 3), and plant symptoms induced (swellings and deformations vs brown or yellow chlorotic spots in aerial parts of plant)

Characteristics of the genus per Subbotin and Ryss, 2024:

 




Female: 

  • Female body 0.5-0.7 mm, almost straight to slightly arcuate.
  • Lip region continuous, high, cephalic framework moderately sclerotised.
  • Median bulb muscular, with strongly refractive valve. Basal bulb usually abutting, offset from intestine or slightly overlapping intestine. Secretory-excretory pore at isthmus level.
  • Lateral field with 4 incisures.
  • Ovary straight, without distinct flexures, its posterior part with one row of oocytes. Spermatheca elongate, with large sperm cells which nuclei occupying most of cell. Crustaformeria in form of quadricolumella, four rows of four cells each.
  • Vulva a transverse slit, vagina perpendicular to ventral body wall.
  • Postvulval uterine sac 1.4-1.8 times longer than vulval body diam.
  • Female tail conical, terminus pointed to minutely rounded

 
 

Male: 

  • Bursa enveloping tail tip (peloderan).

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

Distributed in  tropical regions.

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Economic Importance:

 

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Feeding:

Parasites of aerial parts of plants, causing swellings on leaves, inflorescences, and stems. Infective stages unknown.
No data about associations with insects or fungi. 

 

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Hosts:

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

For Ecophysiological Parameters for this genus, click 
 
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Damage:

 

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Management:

 

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References:

Subbotin, S.A. and Ryss, A.Y. 2024. Revision of the genus Ditylenchus Filipjev, 1936: Ditylenchoides gen. n. and Paraditylenchus gen. n. (Nematoda: Anguinoidea). Russian Journal of Nematology, 32: 91-102.

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Copyright © 1999 by Howard Ferris.
Revised: November 04, 2024.