Amplimerlinius macrurus  

 

Contents

 

Rev 05/31/2022

  Classification Hosts
Morphology and Anatomy Life Cycle

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Economic Importance Damage
Distribution Management
Return to Merliniidae Menu Feeding  References
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Classification:

Rhabditida
       Tylenchina
        Tylenchoidea
           Merliniidae
             Merliniinae

          
          Amplimerlinius macrurus (Goodey, 1932) Siddiqi, 1976

Synonyms

 

 

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Morphology and Anatomy:

The genus Amplimerlinius is characterized by having females with abnormally thickened cuticle at the hemispherical and striated tail terminus, lip annuli without longitudinal indentations, a sclerotized cephalic framework, and a robust stylet  (Ghaderi and Karegar, 2014).

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Female: 

  • Cuticle annulated prominently,
  • Lateral field 27 to 32% of body width, with six lines.
  • Head conoid with six annuli and flattened apex, continuous with body contour.
  • Stylet length 25 to 29 um, well developed; shaft equal to conus, knobs sloping slightly backward.
  • DEGO 3.4 to 3.8um from the base of stylet.
  • Hemizonid anterior to excretory pore.
  • Median bulb slightly elongated with prominent valve plates.
  • Nerve ring 105 to 110 um from the anterior end.
  • Basal bulb cylindrical, length/width ratio 1.5 to 2.0, offset from the intestine, cardia oval, prominent.
  • Vulva at 50 to 59%., flush with the body surface.
  • Vagina about half body width, not sclerotized.
  • Spermatheca rounded, with sperm.
  • Didelphic-amphidelphis, ovaries outstretched, each with a single row of oocytes.
  • Tail clavate, with 48 to 62  annuli at ventral side, tail terminus annulated.
Male: 
  • Head, stylet, pharynx, lateral fields, and annuli: similar to females.
  •  Spicule length: 28 to 34 um
  •  Gubernaculum arch-shaped,
  • Bursa is located 5 to 8um anteriorly to the spicule base
  •  Phasmids 40 to 44% of tail length.

Ref: Stefanovska et al., 2021

 

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

 

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Distribution:

Amplimerlinius macrurus has been reported in several areas of the world in soils under different land use and cover types, including: crops, meadows, pastures, grasslands, forest, fruit, nut, and olive orchards (Stefanovska et al., 2021).

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Economic Importance:

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Feeding:

  A migratory ectoparasite of plant roots.

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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:

Ghaderi, R. and Karegar, A. 2014. Description of Amplimerlinius macrurus sp. n. (Nematoda: Merliniidae) and observations on three other species of the genus from Iran. Zootaxa 3869: 17-32.

Siddiqi, M.R. (2000). Tylenchida: parasites of plants and insects, 2nd edition. Wallingford, UK, CAB International

Stefanovska, T., Skwiercz, Flis, L.,Pidisnyuk, V., Zouhar, M. 2021. First record of the ectoparasitic nematode Amplimerlinius macrurus (Nematoda: Tylenchida) on the perennial grass Miscanthus×giganteus (Angiosperms: Poaceae) in Ukraine. J. Nematology  53: | DOI: 10.21307/jofnem-2021-024

 

 

 

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Copyright © 1999 by Howard Ferris.
Revised: May 31, 2022.