Cactodera   

  

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Rev 03/04/2024

  Classification Hosts
Morphology and Anatomy Life Cycle

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 Economic Importance Damage
Distribution Management

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 Feeding  References
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Classification:

    Tylenchida
       Tylenchina
        Tylenchoidea
         Heteroderidae
          Punctoderinae

           Cactodera Krall' & Krall', 1978

Type species of the genus: Cactodera cacti  (Filipjev & Schuurmanns-Stekhoven, 1941) Krall' & Krall', 1978

    Synonyms:
      None.

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Morphology and Anatomy:

Identification of species in this genus is based on shape of cysts, diantere of fenesrtra, presence of vulval denticles, nature of eggshell, and length of J2 hyaline region in tail.

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 Female: Cyst stage present.  

Cyst of Cactodera weissi

  • Body lemon-shaped to spherical, with short neck and terminal cone.  
  • Cuticle thick, with superficial irregular transverse ridges interrupted by short markings, more or less longitudinal; D-layer present (absent in C. betulae).
  • Vulva terminal on small vulval cone, surrounded by a circumfenestration; vulval slit less than 20 µm long; no underbridge; no bullae; anus without fenestration.  
  • All eggs retained in body (no egg-mass).  

Male: 

  • Body twisted.  
  • Stylet less than 30 µm long.
  • Lateral field with four lines.
  • Spicules greater than 30 µm long, slightly curved, pointed at distal extremity, obliquely directed.  
  • No cloacal tubus.  
  • Tail short, hemispherical. 

Second-stage juveniles:

  • Stylet less than 30 µm long. 
  • Labial disc with 6 sectors
  • Lateral field with four lines. 
  • Esophageal glands filling body cavity.  
  • Tail conical, pointed with hyaline terminal half.  
  • Phasmids punctiform.  

    Luc, Maggenti & Fortuner (1988); Subbotin et al., (2010)

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

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Distribution:

 

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Economic Importance:

 

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Feeding:

Nurse cell system: A syncytium.

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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:

Luc, Maggenti & Fortuner, Rev. Nematol. 11(2):159-176 (1988).

Subbotin, S.A., Cid Del Prado Vera, I., Mundo-Ocampo, M. & Baldwin, J.G. (2011) Identification, phylogeny and phylogeography of circumfenestrate cyst nematodes (Nematoda: Heteroderidae) as inferred from analysis of ITS-rDNA. Nematology, 13, 805-824. https://doi.org/10.1163/138855410X552661

Subbotin, S.A., Mundo-Ocampo, M. & Baldwin, J.G. (2010) Systematics of cyst nematodes (Nematodes: Heteroderinae). Vol. 8. Part A. Brill Academic Publishers, Leiden, 351 pp

 

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