Rev 02/22/2021

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Morphology and Anatomy Life Cycle
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      Teratolobus Andrassy, 1968

Pseudocephalobus Joshi, 1972

Panagoroteratus Andrassy, 1986

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Morphology and Anatomy:

Body size range for the species of this genus in the database - Click:
  • Cuticle finely striated.

  • Lateral alae with two wings; ending at level of phasmids in females and at base of terminal tail mucro in males.

  • Labial region crown-shaped with six well-developed, leaflike, lips with hexaradial symmetry. Lips separated by narrow, sometimes internally sclerotised U-shaped clefts lacking guarding pieces. Each lip supported by a strong radial ridge. All lips similar in shape and size. Each lip with a minute setiform cephalic probola.

  •  Labial probolae absent. Lip region with six labial and four cephalic papillae.

  • Amphidial opening more or less oval.

  • Stoma typically cephaloboid; cheilostom barrel-shaped; cheilorhabdia strongly sclerotised, bacilliform in median optical section. Gymnostom short cylindrical, as wide as cheilostom; gymnorhabdia sclerotised, platelike in median optical section. Stegostom cylindrical, subdivided into four sets of rhabdia.

  • Pharynx cephaloboid. Basal pharyngeal bulb with strongly developed grinder.

  • Phasmids located at 20-50% of tail length.

  • Tail conoid, curved ventrad; tail terminus bearing a terminal mucro of different shape (simple conical, harpoon-like, arrowhead-like, forked) and size.

         Ref: Holovachov and Bostrom, 2006


  • Reproductive system monodelphic, prodelphic.


  • Reproductive system monorchic.
  • Spicules paired and symmetrical. Gubernaculum plate-like, cornua crurum present.
  • Genital papillae: two pairs ventrolateral precloacal; a single midventral papilla on anterior cloacal lip; one subventral pair at level of cloaca; two pairs anterior to phasmid (one pair inside lateral alae and one ventrosublateral pair); one dorsolateral, one ventrolateral and one lateral pair near tail terminus.
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Biology and Ecology:

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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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Holovachov, O., and Bostrom, S. 2006. Panagrolobus vanmegenae, a new genus and species from The Netherlands and Ukraine, with taxonomic revision and two new species of the genus Teratolobus Andrassy, 1968 (Nematoda: Cephalobidae). Nematology 8:377-368.

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Copyright © 1999 by Howard Ferris.
Revised: February 22, 2021.