Plectonchus longevulvus

 

Contents

 

Rev 12/17/2024

  Classification Biology and Ecology
Morphology and Anatomy Life Cycle

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Ecosystem Functions and Services

Distribution Management

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Feeding  References
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Classification:

      Chromadorea
       Rhabditida
         Rhabditia

Tylenchina

Panagrolaimoidea

          Brevibuccidae

Brevibuccinae

Plectonchus longevulvus Khan, Hussain & Tahseen, 2012

 
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Morphology and Anatomy:

Female:

  • Cuticle distinctly loose, 2� to 5 um thick, transversely striated, annuli 0.2 to 0.5 um wide
  •  Longitudinal lines and lateral field indistinct.
  • Lip region continuous with body contour. Labial sensilla papilliform.
  • Amphids inconspicuous.
  • Stoma 0.6 to 1.2 labial diameter long. Cheilostom indistinguishable. Gymnostom and stegostom fused to form weakly sclerotized funnel-shaped chamber narrowing into pharyngeal lumen.
  • Pharynx panagrolaimoid type with 57 to 70 um long, cylindrical corpus, narrower 35 to38 um long isthmus and ovoid basal bulb with a grinder and single-chambered haustrulum.
  • Nerve ring encircling isthmus at 60 to 76% of pharyngeal length, surrounding isthmus.
  • Excretory pore located above nerve ring or at 44 to 57% of pharyngeal length at posterior level of pharyngeal corpus.
  • Cardia conoid, 2 to 4 um long.
  • Reproductive system monodelphic, prodelphic; ovary dorsally reflexed with distal end not reaching vulva.
  • Spermatheca distinctly offset, oval, filled with sperms.
  • Postuterine sac absent.
  • Vulva–anus distance about 2.8 to 4.4 times anal body diameter.
  • Tail elongate, conoid with pointed terminus. Phasmids located at middle of tail.

Male:

  • Testis monorchic, ventrolaterally reflexed, on the right of intestine; occasionally outstretched distally.
  • Vas deferens narrowing into ejaculatory duct.
  • Spicules stout, slightly ventrally curved with round capitula and beak-like distal ends, 1.0–1.4 anal body diam. long.
  • Gubernaculum lancet-shaped, proximallyhooked, 0.7–0.9 times spicule length.
  • Bursa absent.
  • Caudal papillae seven pairs: two precloacal and five postcloacal pairs
  • Tail conoid tapering to a narrow pointed terminus.

Ref: Khan et al., 2012

Plectonchus longevulva
A: enture female; B: entire male C: anterior; D: pharyngeal region; E: female gonad: F: femle tail; G: male tail
from Khan et al., 2012


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

 

 

Distribution:

 Collected and described from alluvial soil in a ditch in India.

 

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Feeding:

Bacterial feeding

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Biology and Ecology:

 

 

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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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Ecosystem Functions and Services:

 

 

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Management:

 

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References:

Bongers, T. 1988. De Nematoden van Nederland, Pirola, Schoorl. Utrecht. 408p.

Khan, R. Hussain, A., Tahseen, Q. 2012.Descriptions of one new and two known species of Panagrolaimoidea (Nematoda) from India. J. Natural History 46:867-864.

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Copyright © 1999 by Howard Ferris.
Revised: December 17, 2024 .