Kittydorylaimus specialis




Rev 08/03/2020

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Morphology and Anatomy Life Cycle
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Kittydorylaimus specialis Andrassy, 1998


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Morphology and Anatomy:


  • Plump nematodes, 2mm long, body narrowing at anterior end; lip region narrow.
  • Cuticle very thick, 4-5 layers,  with raised longitudinal ridges.  In body cross section, cuticle occupies almost 1/4 of total diameter.
  • Lip region strongly offset from body contour; lips separate.
  • Amphids funnel shaped, apertures about half as wide as lip region
  • Odontostyle sinuate, about 2.2 x as long as labial diameter, thinner than cuticle.
  • Guiding ring simple and thin.
  • Esophagus widening gradually at about 55% of its length.
  • Five esophageal gland nuclei clearly visible.
  • Female genital system diovarial, amphidelphic; vulva longitudinal, not sclerotized.
  • Male diorchic adanal papillae and about 15 contiguous ventromedian supplements.
  • Spicules dorylaimoid
  • Tail in both sexes short and bluntly rounded, with offset recurved tip in females and juveniles.

Ref: Andrassy, 1998

Kittydorylaimus specialis: anterior, female genital systems, cuticular thickness relative to body diameter, longitudinal cuticular ridges 

Drawings from Andrassy, 1998

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


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Described from soil and surface detritus in the Morogoro region of southern Tanzania.

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Biology and Ecology:

Andrassy (1998) speculated on the functional significance of the longitudinal ridges and thick cuticle.  He wondered if they provided greater surface area for gaseous exchange.  He noted that while longitudinal ridges are quite ferequent in freashwater species they are quite rare in terrestrial species such as K. specialis.  Additionally, it might be inferred that the extremely thick cuticle provides some protection from predaceous and parasitic organisms.

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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:

Predatory regulation of opportunistic species.

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Andrassy, I. 1998. Kittydorylaimus gen. n. and Kolodorylaimus gen. п., two remarkable new genera of Dorylaimina (Nematoda). Opuscula Zool. Budapest 31:3-15.


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Copyright © 1999 by Howard Ferris.
Revised: August 03, 2020.