Neometadorylaimus coomansi

Neometadorylaimus coomansi	Contents	Rev 02/23/2024
	Classification	Biology and Ecology
	Morphology and Anatomy	Life Cycle
Return to Neometadorylaimus Menu		Ecosystem Functions and Services
	Distribution	Management
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Classification:

Enoplea

Dorylaimia
Dorylaimida

Tylencholaimidae

Vandelindiinae

Neometadorylaimus coomansi (Ali, Farooqui & Suryawanshi, 1971) Jairajpuri & Ahmad, 1992

Morphology and Anatomy:

Moderately slender to slender (a = 29-47) nematodes of medium size, 1.8-2.6 mm long.
Cuticle two-layered, typical tylencholaimid, with irregular refractive elements, 3-4 um thick at mid-body outer layer nearly smooth under LM but with fine transverse striation under SEM
Lateral chord about one-fourth to two-fifths of body diam. at midbody. Lateral body pores indistinct, one or two dorsal pores at odontostyle-odontophore region.
Lip region cap-like, offset from body contour by deep constriction, slightly narrower than adjoining body
Lips amalgamated, labial papillae small, dot-like, closer to lip margins than to oral aperture, cephalic papillae surrounded by annulus,
Amphidial fovea stirrup-shaped, their aperture occupying 43-54% of lip region diam.
Odontostyle straight, robust, ventral arm forked at base, with thick walls and wide lumen, 3.8-5.0 times as long as wide, 1.0-1.1 times lip region diam.
Guiding ring simple, somewhat plicate, located at 0.6 times lip region diam. from anterior end.
Odontophore linear, rodlike 0.7-0.9 times as long as odontostyle.
Pharynx entirely muscular, consisting of a slender anterior section enlarging gradually into a basal expansion occupying 56-63% of total neck length.
Cardia conoid, 17-32 ÃƒÆ’Ã¢â‚¬â€ 17-28 um.
Dorsal intestinal blind sac (caecum) absent in only one female, extending anteriad and surpassing pharyngeal base a distance equal to one-seventh to nine-tenths of body diam. at neck base.

.	Female Didelphic-amphidelphic, with both branches almost equally developed, anterior 10-15%, posterior ofr 11-15% of total body length. Ovaries reflexed, oocytes arranged initially in two or more rows, then in a single row. Oviduct-uterus junction with well-developed sphincter. U Vagina extending inwards for ca 45-53% of body diam., pars proximalis 15-21 ÃƒÆ’Ã¢â‚¬â€ 10-14 um, with somewhat convex walls surrounded by weak musculature, pars refringens consisting of two trapezoidal pieces with angular edges, with a combined width of 14-18 um, and pars distalis 2-3 um long. Vulva a short longitudinal slit. Prerectum 1.1-2.1, rectum 0.7-1.1 anal body diam. long. Tail short, convex conoid to rounded, with two pairs of caudal pores.
Males: Diorchic, with opposed testes and spindle-shaped sperm cells. Adcoacal pair and a series of 9-10 irregularly spaced, ventromedian supplements beginning within range of spicules. Spicules dorylaimoid, relatively robust, 5-6 times as long as wide and 1.2-1.3 times as long as cloacal body diam. Lateral guiding pieces distinct, rod-like. Without bursa. Tail short, similar to that of female, but ventral side becoming less convex, nearly straight or even visibly curved ventrad. Ref: Islam et al., 2020).


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

The type. and as of 2021, only species of the genus, Neometadorylaimus coomansi, was originally described from soil around the roots of groundnut in Maharashtra State, India. Other populations have been found in Gujarat Stae and West Bengal, India (Islam, et al. 2020).

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Feeding:

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Biology and Ecology:

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Life Cycle:

Ecophysiological Parameters:

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

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Ecosystem Functions and Services:

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Management:

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References:

Islam, M.N., Imran, Z., Abolafia, J., Pren-Santiago, R., Ahmad, W. 2020. Morphological and molecular characterisation of Neometadorylaimus coomansi (Ali, Farooqui & Suryawanshi, 1971) Jairajpuri & Ahmad, 1992 (Dorylaimida: Tylencholaimidae), with the first report of its male and new insights into its phylogeny. Nematology 22:313-325