Sychnotylenchus asiaticus

Sychnotylenchus asiaticus	Contents	Rev 08/24/2026
	Classification	Hosts
	Morphology and Anatomy	Life Cycle
Return to Sychnotylenchus Menu	Economic Importance	Damage
	Distribution	Management
Return to Anguinidae Menu	Feeding	References
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Classification:

Chromadorea Rhabditida Tylenchina Tylenchoidea
Anguinidae

Morphology and Anatomy:

Females:

Body length 1.03-1.49 mm, about medium for the genus.
Cuticle finely annulated, lateral field with six to eight incisures at midbody and just anterior to vulval region.
Lip region continuous with body, flattened to slightly rounded anteriorly, ca 2-3 times as wide as high.
Stylet slender, very narrow lumen, minute basal knobs laterally elongated. DEGO close to stylet knobs.
Pharynx with cylindrical procorpus, muscular metacorpus with small valve; nerve ring encircling posterior of slender isthmus ; excretory pore close to level of nerve ring.
Basal bulb of pharynx long and wide with short overlap of intestine
Monodelphic-prodelphic; ovary outstretched, spermatheca filled with sperm.
Vulva a transverse slit at 90% of body length.
Tail cylindrical to conoid.

Males:

Similar morphology to female.
Monorchic, testis outstretched, occupying 55-71% of the total body length.
Spicules smoothly arcuate; 70-90% of tail length.
Gubernaculum simple, slightly curved in lateral view, 35-47% of spicules length.
Bursa wide and peloderan.
Tail conoid, with a pointed tip.

Ref: Mwamula et al., 2026

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

Distribution:

Sychnotylenchus asiaticus was descrtibed from the bark and wood of dead-pinewood nematode-infected black pine trees (Pinus thunbergii) in South Korea (Mwamula et al., 2026).

Feeding:

Feeding on fungi assaociated with insect frass and dead wood tissue.

Hosts:

For an extensive host range list for this species, click

Life Cycle:

Sychnotylenchus asiaticus is sexually reproducing based on presence of males and sperm in spermatheca.

Ecophysiological Parameters:

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

Management:

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

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

Mwamula, A.O., Bae, C-h., Kim, Y.S., Lee, Y-D., Lee, D.W. 2026. A new anguinoid, Sychnotylenchus asiaticus n. sp. and additional DNA barcode data for Devibursaphelenchus alienae (Nematoda: Tylenchomorpha) from Korea. Nematology 28:209-228