Hemicycliophora labiata




Rev 07/19/2021

Sheath Nematode Classification Hosts
Morphology and Anatomy Life Cycle
Return to Hemicycliophora Menu Economic Importance Damage
Distribution Management
Return to Hemicycliophoridae Menu Feeding  References
    Go to Nemaplex Main Menu   Go to Dictionary of Terminology





          Hemicycliophora labiata Colbran, 1960

Back to Top

Morphology and Anatomy:

  • Body slightly arcuate ventrally from vulval level.
  • Head region annuli rounded.
  • Lip region composed of 2-3 annuli. Lips appeari to be separate.
  •  Head somewhat rounded and continuous with body.
  •  Stylet knobs well developed, rounded, slightly sloping posteriorly
  • Excretory pore posterior close to base of pharyngeal basal gland .
  • Vulval lips well developed. In young adults, vulval lips and vulval sleeve indistinct, vulva closed or covered by cuticle, with outer cuticle raised above body contour. In mature adults, vulval sleeve 1-3 annuli long,
  • Ovary single, anteriorly outstretched, infrequently reflexed.
  • Spermatheca rounded, filled with sperm,.
  • Tail elongated, slightly convex dorso-ventrally, tapering abruptly towards posterior third to a conoid and uniformly narrowing part with a rounded terminus. Tail annulation distinct and smaller than body annulation
  • Cuticular sheath attached at head and vulval region, mostly loosely fitting anteriorly around pharyngeal region and dorsal side of body, fully detached in post-vulval body region. . Lateral field with one prominent line. Two more lines appearing ca 10-15 annuli posterior excretory pore level, running throughout body length to upper vulval region, often forming one or two rows of blocks along most of body length.

ref: Mwamula et al (2020)



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

Back to Top


Back to Top

Economic Importance:


Back to Top


  Ectoparasite at and near root tips.

Back to Top



For an extensive host range list for this species, click


Back to Top

Life Cycle:

Based on abundance of sperm in spermatheca, probably sexually reproducing.  However, males not found and probably morphologically different from female.

Ecophysiological Parameters:

For Ecophysiological Parameters for this species, click If species level data are not available, click for genus level parameters


Back to Top




Back to Top


Host Plant Resistance, Non-hosts and Crop Rotation alternatives:

For plants reported to have some level of resistance to this species, click


Back to Top


Colbran, R.C. (1960). Studies of plant and soil nematodes. 3. Belonolaimus hastulatus, Psilenchus tumidus and Hemicycliophora labiata, three new species from Queensland. Queensland Journal of Agricultural Science 17, 175-181.

Mwamula, O.K., Y. H.Kim, H. Na, H.J. An, Y.H. Kim and D.W. Lee. 2020.  Molecular characterisation and phylogenetic position of Hemicycliophora labiata Colbran, 1960, from turfgrass in Korea, with comments on its morphology. Nematology 22:927-938.


Back to Top

Copyright © 1999 by Howard Ferris.
Revised: July 19, 2021.