Laimaphelenchus africanus

Contents

Rev 06-12-2022

  Classification    
Morphology and Anatomy Life Cycle
Return to Laimaphelenchus Menu Distribution Ecosystem Functions and Services
Feeding Management
Return to Aphelenchoididae Menu Biology and Ecology References
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Classification:

Chromadorea
Tylenchida
Aphelenchina
Aphelenchoidea
Aphelenchoididae
Bursaphelenchinae
Laimaphelenchus africanus Afshar,Rashidifard, Abolafia, Zouhar, Fourie & Pedram, 2021
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Morphology and Anatomy:

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Female:

  • .Body slender, slightly arcuate ventrally when heat relaxed.
  • Cuticle with fine transverse annulations
  • Lateral field with four incisures, the inner band narrower than the outer bands.
  •  Cephalic region rounded, offset by a shallow constriction, without a labial disc and with six equally sized lips not separated by ribs.
  •  Cephalic papillae four at mid-position of lip region height, labial papillae six surrounding the oral aperture.
  •  Amphidial apertures pore-like,
  • Stylet slender, anterior conus about half of total, shaft with three small swellings.
  •  Pharynx with cylindrical procorpus cylindrical, oval metacorpus with central valve; cardia subcylindrical.
  • Dorsal pharyngeal gland well-developed, slender, with three visible nuclei, overlapping intestinal dorsally.
  • Secretory/excretory pore  almost opposite to the nerve ring.
  • Monodelphic, prodelphic; ovary outstretched with oocytes in a single row, oviduct short,
  • Spermatheca oval to oblong filled with amoeboid
  • Vulva a transverse slit with a well-developed vulval flap overlapping the posterior lip,
  • Postuterine sac 63-125 um long (3.2-5.3 x vulval body diam)
  •  Anus distinct, well developed.
  • Tail conical, ventrally curved, dorsally convex, lacking tubercles,but with six to nine small projections at the tip of a subventral stalk.
 

Male:

  • Rare, although there were sperm in female spermatheca.
  •  Body slender, similar to that of the females
  • Monorchic, testis outstretched, with spermatocytes in a single column.
  • Spicules curved, 17um long
  •  Only one pair of subventral papillae observed (P3), located at middle of the tail.
  • Bursa absent.
  • Tail curved ventrally, its terminus similar to that of females
 

Ref: Ahshar et al., 2021

 

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

 

 
 
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Distribution:

Species described from dead Pinus pinaster wood in Potchefstroom, South Africa.

 

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Feeding:

Feeding habits uncknown

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Biology and Ecology:

 Not known to be associated with insects or beetle galleries.

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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:

Fungivore; Laimaphelenchus is not considered pathogenic on conifers.

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Management:

 

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References:

Afshar, S.J., Rashidifard, M., Abolafia, J., Zouhar, M., Fourie, H., Pedram, M. 2021.Laimaphelenchus africanus n. sp. (Tylenchomorpha: Aphelenchoididae) from South Africa, a morphological and molecular phylogenetic study, with an update to the diagnostics of the genus. J. Nematology, 53: DOI: 10.21307/jofnem-2021-053

 Baujard, P. (1981). Revue taxonomic du genre Laimaphelenchus Fuchs, 1937 et description de Laimaphelenchus pini n. sp. Revue de Nematologie 4:75-92.

Hunt, D.J. (1993) Aphelenchida, Longidoridae and Trichodoridae: Their Systematics and Bionomics.  (University Press, Cambridge).

Massey, C.L. 1974. Biology and taxonomy of nematode parasites and associates of bark beetles in the United States.  Agric. Handb. USDA 446:233p.

 

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Copyright © 1999 by Howard Ferris.
Revised: December 06, 2022.