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

Classification:

Type species of the genus

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Morphology and Anatomy:

Females:

• Body straight to slightly curved
• Cuticle about 2 um thick, without distinct layers; fine transverse striae discernible  at the extremities.
• Lateral body pores in a staggered row; nineteen in neck region, becoming less prominent from head end towards the cardia; but lateral organs, become more prominent in that direction. Four dorsal pores, confined to the area anterior to the nerve ring. About ten ventral pores in the neck region.
• Lateral chord starting narrow but widening before nerve ringand becoming about 40% of body diam at cardia and about 30% at mid-body, narrow at tail.
• Lip region expanded, offset, about 2.5 times as wide as high;\. Sensilla only slightly protruding with a circle of six inner labial and four cephalic sensilla and an circle of six outer labial sensilla.
•  Amphid aperture 60%  of corresponding head width; mabout 14 um behind oral aperture.
• Odontostvle 2.5-3 um wide, with aperture 37.5 % of its length. Odontophore linear, dabout 40 um long, spindle-shaped.Guiding ring double
• Cheilostome with four onchia, without denticles but with rugose wall.
• Pharynx widens gradually and then abruptlygradually widens, then widens more abruptly at 53 % of its length
• Nerve ring surrounding  pharynx at about 30% of neck length.
• Cardia heart-shaped
• Didelphic-amphidelphic
• Tail dorsally convex-conoid, then tapeying in its terminal third, with a pointed tip

Males:

• Spicules curved. Lateral guiding pieces 7 um long.
• An adcaudal pair tand fiiteen evenly spaced ventromedian supplements
• Five conspicuous caudal pores on each side of the tail.
•  Tai1 dorsally convex- conoid at first, then tapering to a straight and finally dorsally bent elongate part with a pointed tip

Ref: Coomans et al., 1990

Trachypleurosunt conforme A : Amphid; B : Anterior body end; C : Same, showing postodontophore constriction; D : Female posterior genital branch; E : Base of pharynx; F : Female, entire view; G : Male, entire view; H : Part of uterus with Z-differentiation; 1 : Male, posterior part; J : Male, posterior part and supplement region; K : Spicule and lateral guiding piece; L : Female, posterior part; M : Sperm. Drawings from Coomans et al., 1990

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Distribution:

Collected from moss next to a mountain stream in Ivory Coast, West Africa

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Feeding:

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

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Biology and Ecology:

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Life Cycle:

Ecophysiological Parameters:

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Ecosystem Functions and Services:

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Management:

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References:

Andrassy, 1. 1959. Neubenennungen einiger homonymen Nematoden-Gattungen. Nematologica, 4:223-226

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

Coomans, A., Vinciguerra, M-T., Loof, P.A.A. 1990. Status of the genera Paractinolaimus .Meyl, 1957, Trachypleurosum Andrassy, 1959 and Trachactinolaimus Andrassy, 1963 (Nematoda : Actinolaimidae) with description of Trachypleurosum venezolanum n. sp.  Rev. Nematol. 13:143-154.

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

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Revised by Howard Ferris: September 15, 2026.