Ektaphelenchoides factum

Ektaphelenchoides factum	Contents	Rev 12/09/2025
	Classification	Hosts
	Morphology and Anatomy	Life Cycle
Return to Ektaphelenchoides Menu	Economic Importance	Damage
	Distribution	Management
Return to Aphelenchoididae Menu	Feeding	References
	Go to Nemaplex Main Menu	Go to Dictionary of Terminology

Classification:

       Chromadorea
       Rhabditida
       Tylenchina
         Aphelenchoidea
          Aphelenchoididae
           Ektaphelenchoidinae

Ektaphelenchoides factum Gu, Munawar, Ma & Fang, 2024.

Morphology and Anatomy:

Male:

Body cylindrical, tail strongly curved
Cuticle finely annulated, lateral field with three incisures
Lip region set off from body contour by a clear constriction.
Stylet well developed, without basal swellings,
Procorpus cylindrical, ca 3-4 x stylet length. Metacorpus rectangular with conspicuous valve plates
DEGO in lumen of metacorpus
Pharyngeal gland lobe slender
Nerve ring about 10-15 um posterior to metacorpus.
Developing spermatocytes arranged in two rows. Sperm amoeboid.
Spicules arcuate, separate, lamina smoothly curved to distal end, capitulum slightly curved,
Tail arcuate, conical, with a sharply pointed mucron Two pairs of genital papillae present, one adcloacal ventro-lateral pair 2 um anterior to cloacal aperture, one postcloacal ventro-lateral pair

Female:

Similar to male in general morphology,
Monodelphic, prodelphic, ovary outstretched, anterior sometimes reflexed e
Oocytes arranged in 2-3 rows in anterior part and posterior part of ovary.
Spermatheca oblong containing round sperm cells in multiple rows.
Vulval with flapPost uterine sac well developed, length 1.5-2 x vulva body diam.,
Intestine appears to end in a blind sac; anus and rectum indistinct or vestigial, presumably not functional.
Tail dorsally convex, filiform

Ref: Gu et al., 2014

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

Distribution:

Described from logsof Pinus taeda imported from the USA at Ningbo port, P.R. China.

Feeding:

Predation in nematodes by members of the genus is of ecological signficance. Probable phoretic relationship with bark beetles of other insects.

Life Cycle:

Ecophysiological Parameters:

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

References:

Gu, J., Munawar, M., Ma, X., Fang, Y. 2024. Ektaphelenchoides factum n. sp. in Pinus taeda from the USA and E. pini in Pinus koraiensis from China. Nematology 26: 547-563

Kanzaki, N. 2014. Ektaphelenchoide spondylis is a predatory nematode. Nematology 16:245-247.

Kanzaki, N., Giblin-Davis, R.M. and Center, B.J. 2009. Description of Ektaphelenchoides fspondulis n.sp. (Nematodea: Ektaphelenchinae) isolated from factum buprestoides (Coleoptera: Cerambysidae) in Japan. Nematology 11:181-188.