Paractinolaimus uljinensis

Paractinolaimus uljinensis	Contents	Rev 07/02/2025
	Classification	Biology and Ecology
	Morphology and Anatomy	Life Cycle
Return to Paractinolaimus 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

Paractinolaimus uljinensis Mwamula, Kim & Lee, 2024

Synonyms:

Morphology and Anatomy:

Cuticle 2.0 6.0 um at various levels along body; lateral chords occupying about 20% of body diameter.
Lip region 2.3 to 2.8 times as wide as high, anteriorly truncate, with mainly angular sides, offset by a depression.
Vestibular ring corrugated, cheilostome well sclerotized with four onchia and several pointed denticles.
Amphids stirrup-shaped, with a wide opening, occupying 45% to 48% of lip region diameter.
Odontostyle massive, 1.2 - 1.4 times the lip region diameter; aperture occupying 32% - 44% of odontostyle length.
Odontophore simple, rod-like.
Guiding ring "double", located at one lip region diameter from anterior end.
Two body pores present both dorsally and ventrally at the level of odontostyle.
Pharynx muscular, with slender anteriorgradually increasing in diameter. Nerve ring encircling the slender part of corpus at 26% to 32% of pharynx length; glandularium (the expanded part of the pharynx) gradually expandung and occupying 56.3% - 63.4% of the total neck length.
Pharyngeal gland nuclei at (%): D = 49.2- 55.5, AS1 = 74.0 - 76.7, AS2 = 75.0 - 78.5, and PS = 85.1 - 88.3 (as defined by Loof and Coomans (1970), and AndrÃ¡ssy (1998)). Basal shield of pharynx with extended bulges at pharynx-intestine junction.
Cardia variable in length, conoid, projecting into the intestine. .

Female:

Didelphic amphidelphic, both branches outstretched.t. Oviduct outstretched, oviduct-uterus junction with a sphincter.
Uterus filled with abundant sperm.
Vagina perpendicular to body axis, occupying nearly 50% of vbd; pars refringens with two irregularly ovoid piece
Vulva wide and longitudinal in profile.
Several pre- and postvulval papillae present
Tail long, curved ventrad or straight. becoming filiform posteriorly, with a finely rounded or pointed tail terminus; 10.1 - 14.2 times abd.

Ref: Mwamula et al., 2024

Male:

Generally as abundant as females.
Diorchic, testes symmetrical, with sausage to spindle-shaped sperms
6.0 to 8.0 Î¼m long.
Spicules massive, ventrally curved, 1.8 -2.1x cbd with lateral guiding pieces
Supplements a precloacal pair and a series of 12 to 15 contiguous ventromedian supplements.
Prerectum 5-7.6 and rectum 1.5 - 2.0 x cbd, respectively.
Tail 0.6-0.9 x cbd, conoid to broadly rounded, with four distinct pairs of caudal pores

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

Distribution:

Described frrom a natural, protected pine forest ecosystem in Uljin, Gyeongsangbuk-do Province, Korea (Mwamula et al., 2024)

Feeding:

Categorized by Yeates et al., 1993 as a predator and omnivore.

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.

Mwamula, A.O., Kim, Y.S., Lee, D.W., 2024. Morphological and molecular characterization of Paractinolaimus uljinensis n. sp. (Nematoda: Actinolaimidae) from Korea, with an updated compendium of the genus. J. Nematology 56: DOI: 10.2478/jofnem-2024-0040

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