Trichodorus pseudoaequalis

 

Contents

 

Rev 08/11/2023

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

      Enoplea
       Triplonchida
        Diphtherophorina
         Diphtherophoidea
          Trichodoridae
           Trichodorinae
             Trichodorus pseudoaequalis Decraemer & Subbotin, 2021

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Morphology and Anatomy:

 
  • Medium-sized body about for the genus, about 800 um long

Female:

  • Body straight to slightly ventrally curved, tail minute, anus subterminal.
  • Reproductive system didelphicamphidelphic, ovaries reflexed, two finely granular oviduct cells located near tip of reflexed ovary and spermatheca or proximal part of uterus differentiated by presence of sperm.
  • Vagina pear-shaped, rather short, surrounded by well-developed sphincter muscles and provided with small, closely-spaced vaginal sclerotised pieces.
  • One pair of post-advulval sublateral body pores located 9.5-18 um from vulva
  • One pair of anterior sublateral body pores ca four vulval body diam. anterior to vulva.

Male

  • Cuticle slightly to moderately swollen upon fixation, slightly swollen at tail tip.
  •  Lip region rounded, marked by four slightly raised double papillae (four cephalic and four subdorsal and subventral outer labial papillae).
  • Amphids with slit-like opening just posterior to lip region and funnel-shaped fovea.
  • Pharyngostome with slight ventrally curved onchiostyle with onchium about half as long.
  • Pharynx gradually widening to a glandular bulb
  • Pharyngeal bulb offset, with three visible (of the total of five) gland nuclei, dorsal gland nucleus at posterior third of bulb,
  • Two cervical papillae anterior to secretory-excretory pore
  • Reproductive system monorchic, with germinal zone rather long (68 μm) and long vesicula seminalis, packed with sperm with sausage-shaped nucleus
  • Spicules 39 um long, slightly ventrally curved, and blade with slight indentation mid-way and striation more pronounced in posterior half.
  • Gubernaculum parallel to spicules

 

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

Ref: Decraemer and Subbotin, 2021
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Distribution:

Type specimens recovered soil around roots of Salix tree near American River in Rancho Cordova, California.

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Economic Importance:

 

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Feeding:

Ectoparasitic; feeds on epidermal cells just behind root tips.

 

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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:

Host Plant Resistance, Non-hosts and Crop Rotation alternatives:

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

 

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References:

Decraemer, W. and Subbotin, S.A. 2021. Molecular and morphological characterisation of Trichodorus species (Nematoda: Trichodoridae), with description of T. pseudoaequalis n. sp. from California and other states of the USA. Nematology 23:317-344.

 
Copyright  1999 by Howard Ferris.
Revised: August 11, 2023.