Rafflesius singaporensis

Rafflesius singaporensis	Contents	Rev 01/29/2020
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Dorylaimia
Dorylaimida

Hulqinae

Rafflesius singaporensis Ahmad, 2007

Cuticle finely striated, 1.2-2.0 Âµm thick at mid-body and 2.5-3.0 Âµm on tail.
Lateral chords at mid-body occupying ca 25% of corresponding body diam. Lateral hypodermal glands absent. Lateral, dorsal and ventral body pores indistinct.
Lip region continuous with body, smooth, ca twice as wide as high and ca 29-34% as wide as body diam. at neck base.
Lips completely amalgamated; labial papillae indistinct, not protruding above labial contour.
Amphids stirrup-shaped, their aperture ca 55-65% of corresponding body diam. wide.
Odontostyle slender, ca as long as lip region diam., its aperture ca one-third of its length. Guiding ring single, at ca 0.55-0.60 lip region diam. from anterior end.
Odontophore simple, rod-like, ca 1.7- 1.8 times odontostyle length long.
Nerve ring located at 32-36% of neck length from anterior end.
Esophageal expansion abrupt; expanded part occupying ca 45-47% of total neck length.
Thin cardiac disc present at base of esophagus. Cardia short hemispheroid, ca one-third of corresponding body diam. long.
Espophageal gland nuclei and their orifices located as follows: DO = 61-62; DN = 65-66; DO-DN = 4-5; S1N1 = 80-82; S1N2 = 84-85; S2N = 89.0-89.5; S2O = 90-91.
Tail long, filiform, 8.9-11.5 anal body diam. long with single pair of caudal pores on each side.

Female:

Genital system monoopisthodelphic.
Ovary reflexed, measuring 68-119 Âµm with oocytes arranged first in a single and then in double rows. Oviduct joining ovary subterminally, 76-117 Âµm long.
Sphincter present at oviduct-uterus junction.
Uterus a simple tube, 40-61 Âµm long.
Anterior genital branch represented by a very small sac.
Vulva transverse.
Vagina extending inward ca one-third to half of corresponding body diam. Pars proximalis vaginae 5.5-6.5 Âµm long with spherical walls encircled by circular muscles; pars refringens vaginae with two triangular sclerotised pieces, each measuring 4.0-4.5 Ã— 2.5 Âµm; pars distalis vaginae 2.5-3.5 Âµm.
Prerectum 2.2-2.7 anal body diam. long. Rectum 1.4-1.5 anal body diam. long.

Ref: Ahnad, 2007

Males: Males unknown

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

Described from specimens collected from soil around roots of bushes and forest trees from Rifle Range Road, opposite Maurname reservoir, Singapore.

Ecophysiological Parameters:

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