Caenorhabditis auriculariae




Rev 09/17/2022

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    Caenorhabditis auriculariae Tsuda & Futai, 1999
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Morphology and Anatomy:


Morphology and Anatomy:

Caemorhabditis auriculariae. A. Female; B. Male. Adapetd from Tsuda and Futai 1999



  •  Cuticle smooth, with fine annules.
  • Lateral field with three ridges.
  •  Head terminates in six lips; each lip with one labial sensillum,
  • Amphids inconspicuous.
  • Stoma relatively short, surrounded by short pharyngeal collar; length of stoma averaging about two times of its width.
  • Metarhabdions each with a bifid flap-like tooth (a distinguishing character from other species).
  •  Pharynx with muscular terminal bulb, narrow isthmus, metacorpus swollen to form median bulb.
  • Nerve ring circles isthmus.
  • Deirids between the center and the dorsal-most ridge of lateral field,.
  • Excretory pore near anterior of terminal bulb.
  • Vulva a transverse slit, located at midbody.
  • Gonad didelphic and dorsally reflexed,with anterior branch longer than the posterior one.
  •  Oviduct forming a spermatheca containing sperm cells; sphincter between spermatheca and uterus.
  • Oviparous.
  • Tail elongate with filiform tip.


  • Body similar to female in general appearance, usually shorter and thinner.
  • Lateral field extending from the base of median bulb to anterior end of bursa.
  • Monorchic; testis right of the intestine,
  • Male tail peloderan, bursa ellipsoid and anteriorly closed, posterior tip typically rounded.
  •  Caudal papillae 2+1+3+3 pattern, papilla 6 slightly thicker than others.
  •  Gubernaculum almost straight, half as long as spicule.
  • Spicules robust with dorsal velum, slightly curved ventrally, unfused, distal tips pointed.
  • Anteriorly bifid cap structure on the precloacal lip.

Dauer Juveniles with closed stoma and 5 ridges in lateral field'


Ref:Tsuda and Futai, 1999




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




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Reported  from the fruiting bodies of the muchroom Auricularia polytricha

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  Besides being isolated from Auricularia, the nematode was also found on rotting wood of the tree on which rhew fungus was growing (Tsuda and Futai, 1999).

Males copulate with females; male deposits a gelationous plug at female vulva.

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Biology and Ecology:

The species is gonochoristic and oviparous, females with up to 4 eggs in uterus.  Males as abundant as females.

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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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Tsuda, K. and Futai, K. 1999. Description of Caenorhabditis auriculariae n.sp. (Nematoda: Rhabditidae) from the fruiting bodies of Auricularia polythricha. Japanese J. Nematol. 29:18-23.

For more information on nematodes: Go to Nemaplex Main Menu

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Copyright © 1999 by Howard Ferris.
Revised: September 17, 2022.