Neocephalobus

 

Contents

 

Rev 12/29/2025

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

    Go to Nemaplex Main Menu   Go to Dictionary of Terminology

 

Classification:

      Chromadorea
         Rhabditida
         Rhabditia

Tylenchina

Panagrolaimoidea

          Panagrolaimidae

Tricephalobinae

Neocephalobus Steiner, 1929

Type species of the genus: Neocephalobus aberrans Steiner, 1929

Tricephalobus is now considered a junior synonym of Neocephalobus (Bhat et al., 2025).

Synonyms:

Tricephalobus  Steiner, 1936

 Trilabiatus Goodey, 1963

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Morphology and Anatomy:

Males:

  • Monorchic, testis reflexed on dorsal side anteriorly.
  • Genital papillae precloacal and postcloacal
  • Spicules curved ventrally, manubrium rounded, ventrally bent, calamus scarcely developed,
  • Gubernaculum well developed, ca 45-52% of the spicule length.
  • Tail conical, distally curved ventrad, narrower at distal portion, with phasmids positioned posteriorly

Ref: Bhat et al., 2025

Females:

  • Monodelphic-prodelphic, on right side of intestine. Ovary without flexure posterior to vulva level and reaching the rectum;
  • Post-vulval uterine sac 0.4- 0.6 times longer than corresponding body diam., vagina extending inward less than half body width,
  • Uterine eggs in different stages of embryonation,
  • Vulva lips protuberant, posterior to middle part of the body.
  • Rectum 0.9-1.1 times abd.
  • Tail conoid-elongate, narrower at distal portion, with an acute tip,
  • Phasmids at 56-69% of tail length.
Neocephalobus differs from Panagrolaimus tin having a prominent mid-ventral precloacal papilla in males,. This morphological distinction  is supported bymolecular analysis (Bhat et al. 2025).
   
Body size range for the species of this genus in the database - Click:
 
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Distribution:

 The type species has been redecribed from slugs in agricultural flelds in Western Uttar Pradesh, India (Bhat et al., 2025).

 

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Feeding:

Food Sources and Feeding strategies for the genus Neocephalobus

 

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Biology and Ecology:

Type species redesribed from slugs. Cultured on Galleria mellonella.

 

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Life Cycle:

For Ecophysiological Parameters for this genus, click 
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Ecosystem Functions and Services:

 

 

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Management:

 

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References:

Andrassy, I. 2005. Free-living Nematodes of Hungary I. Hungarian Natural History Museum 518p.

Bhat, A.H., Yadav, K., Abolafia, J., Chaubey, A.K., Fouad, D., Machado, R.A.R. 2025. Redescription of Neocephalobus aberrans Steiner, 1929 (Rhabditida, Panagrolaimidae) with restoration of the genus and its taxonomic implications. Nematology 27: 561-581.

 

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Copyright © 1999 by Howard Ferris.
Revised: December 29, 2025 .