Paractinolaimus

Paractinolaimus	Contents	Rev 06/24/2023
	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
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Classification:

Enoplea

Dorylaimia
Dorylaimida

Actinolaimidae

Actinolaiminae

Paractinolaimus Meyl, 1957

Synonym

Hexactinolaimus Yeates, 1973

Morphology and Anatomy:

The genus Paractinolaimus is the most widespread and richest in species of the Actinolaimidae. Thirty two species of the genus have been described as of 2013, some from very few specimens and most only found one time.
Body length 1.4 - 4.5 mm
Cuticle smooth, no longitudinal ridges
Lip region with corrugated vestibular ring
Vestibular walls with numerous small denticles.
Dorylaimoid odontostyle surrounded by onchia
Esophagus muscular throughout length with posterior half widened into a cylindrus.
Tails differ between sexes.

The genus Paractolaimus differs from Afractinolaimus Andrassy, 1970, which has a similar stomal structure, in the arrangement of the supplements: they are grouped in two fascicles in Afractolaimus.

Female:

Didelphic-amphidelphic
Vulva longitudinal or transverse with sclerotized inner lips
Tail elongate to filiform.

Males:

Spicules dorylaimoid
Ventro-median supplements arranged in a series.
Tail bluntly rounded.

Ref: Andrassy, 2009

Body size range for the species of this genus in the database - Click:

Feeding:

Categorized as predators by Yeates et al., 1993

Life Cycle:

For Ecophysiological Parameters for this genus, click

Ecosystem Functions and Services:

References:

Andrassy, l. 1970. Nematodes from some river systems in South Africa. Opusc. Zool. Bpest 10: 179-219.

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

Vinciguerra, M.T. and Heyns, J. 1984. Freshwater nematodes from South Africa. 8. New and known species of Actinolaimoidea, South African Journal of Zoology, 19:3, 135-140, DOI: 10.1080/02541858.1984.1144787

Vinciguerra, M.T., Clausi, M., Orselli, L., 2013. Description of a new species of Paractinolaimus Meyl, 1957 (Dorylaimida: Nematoda) and a compendium of all the nominal species of the genus. J. Nematode Morphology and Systematics 26:49-57.

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