Oriverutus nusi

Oriverutus nusi	Contents	Rev 01/29/2020
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Oriverutinae

Oriverutus nusi Ahmad, 2007

Cuticle finely striated, 1.5-2.0 Âµm thick at mid body and 2.0- 2.5 Âµm on tail.
Lateral chords at mid body occupying ca one-fourth of corresponding body diam. Lateral, dorsal and ventral body pores indistinct.
Lip region offset by constriction, ca two and a half times as wide as high and ca two-fifths as wide as body diam. at neck base.
Lips separate, lobe-like; labial papillae distinctly protruding above labial contour.
Amphids stirrup-shaped, their aperture occupying ca two-thirds of corresponding body diam.
Odontostyle dorylaimoid, attenuated, ca 1.6-1.7 times lip region diam. long; its aperture ca one-eighth to one-seventh of its length. Guiding ring single, located at 0.68-0.78 lip region diam. from anterior end.
Odontophore simple rodlike, almost equal to odontostyle in length, its anterior part usually convoluted. Nerve ring located at 41-43% of neck length from anterior end.
Esophageal expansion gradual, expanded part occupying 40-42% of total neck length.
Cardia short, conoid; cardiac glands distinct.
Esophageal gland nuclei and their orifices located as follows: DO = 62.5-63.0; DN = 65-66; DO-DN = 2.6-3.5; S1N1 = 76.5- 77.5; S1N2 = 81.5-82.0; S2N = 88.5-90.5; S2O = 90- 92.Tail elongate conoid, ventrally curved with straight to slightly dorsally bent terminus, 2.1-2.5 anal body diam. long, tail tip rounded. Two caudal pores on each side.

Fenale:

Genital system amphidelphic; both sexual branches almost equally developed.
Ovaries reflexed, measuring 31- 41 Âµm (anterior) and 42-76 Âµm (posterior) with oocytes arranged in a single row except near tip.
Oviduct joining ovary subterminally, measuring 36-39 Âµm (anterior) and 36-38 Âµm (posterior). Sphincter well developed, at oviduct-uterus junction.
Uterus a wide tube, measuring 32-36 Âµm (anterior) and 36-38 Âµm (posterior).
Vagina extending inwards ca half of corresponding body diam. Pars proximalis vaginae spheroid, 9.0-9.5 Âµm long and 11-12 Âµm wide, encircled by circular musculature. Pars refringens vaginae appearing as two drop-shaped sclerotised pieces in lateral view, each measuring 4 Ã— 3 Âµm, cw 8.5-9.0 Âµm. Pars distalis vaginae 3.0-3.5 Âµm with curved walls.
Prerectum 2.2-3.7 anal body diam. long.
Rectum1.1-1.3 anal body diam. long.

Male: Unknown

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

Described from specimens collected from soil around roots of forest trees from Kent Ridge Park, near the National University of Singapore, Singapore

Ecophysiological Parameters:

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

Ahmad, W. 2007. New and known species of Dorylaimoidea (Nematoda: Dorylaimida) from Singapore. Nematology 9:215-229.