Egtitus invaginatus

Egtitus invaginatus	Contents	Rev 09/15/2026
	Classification	Biology and Ecology
	Morphology and Anatomy	Life Cycle
Return to Egtitus Menu		Ecosystem Functions and Services
	Distribution	Management
Return to Actinolaimidae Menu	Feeding	References
	Go to Nemaplex Main Menu	Go to Dictionary of Terminology

Classification:

Enoplea

Dorylaimia
Dorylaimida

Actinolaimidae

Egtitus invaginatus Mwamula, Bae, Kim. Kim. Lee & Lee, 2026

Morphology and Anatomy:

Medium sized body 1.67-2.12 mm long,
Lip region expanded, 2.1-2.5 times as wide as high, anteriorly truncate, with rounded to angular sides, offset by a depression;
Vestibular ring corrugated, labial and dental chambers well separated, Cheilostome with four simple uni-tipped onchia, with no rasp-like denticles.
Amphids stirrup-shaped, with a wide aperture, 2-3 ventral body pores in pharyngeal region,
Odontostyle massive, 19.0-21.0 um long, as long as the lip region diameter,

Ref: Mwamula et al., 2026

Female:

Didelphic-amphidelphic; pars refringens vaginae with two small irregularly ovoid to D-shaped pieces,
Vulva at mid-body, flush with body contour, a transverse slit.
One to three ventral cleft-like invaginations are present at 4.0-6.0 um posterior to anal opening, forming papilla-like outgrowth,
Tail straight or slightly curved ventrad, 12.5-17.5 times ABD

Males:

Males vert rare
Spicules 46.5 um long,
Seven spaced ventromedian supplements
Tail conoid to broadly rounded, almost as long as CBD

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

Distribution:

Species isolated from litter soil around a dead pine tree in a natural Pine forest in Korea (Mwamula et al., 2026).

Feeding:

Categorized as predators and omnivores by Yeates et al., 1993

Life Cycle:

Ecophysiological Parameters:

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

Ecosystem Functions and Services:

References:

Andrassy, I. 2009. Free-living Nematodes of Hungary III. Hungarian Natural History Museum, Budapest. 608p.

Andrassy, I. and Esquivel, A, 2012. Free-living nematodes from nature reserves in Costa Rica: Genera Egtitus Thorne, 1967 and Trachypleurosum Andrassy, 1959, (Dorylaimida: Actinolaimidae). Opusc. Zool. Budapest, 2012, 43(1): 3-19.

Mwamula, A.O., Bae, C., Kim. Y.S., Kim. Y.H., Lee, Y., Lee, D.W. 2026. A new actinolaim, Egtitus invaginatus n. sp. (Nematoda: Actinolaimidae) from South Korea. J. Nematology 58:137-149.

Yeates, G.W., T. Bongers, R. G. M. De Goede, D. W. Freckman, and S. S. Georgieva. 1993. Feeding habits in soil nematode families and genera—An outline for soil ecologists. Journal of Nematology 25:315-331