Enchodelus parateres, Baqri & Jairajpuri, 1974, 1974

Baqri, Qaiser H. & Jairajpuri, M. Shamim, 1974, Nematodes Of High Altitudes In India V. Five New Species Of The Genus Enchodelus Thorne, 1939 (Dorylaimida), Nematologica 20 (2), pp. 131-146 : 140

ENCHODELUS PARATERES N. SP.

( Fig. 4 )

Measurements: See Table I .

Description:

Female: Body tapering slightly towards both extremities, when fixed curving ventrally behind base of oesophagus and more so in posterior third. Cuticle finely striated, its thickness 6 -8 p,m on tail tip. Lateral chords 1/7th-1 /Sth of body-width near midbody. Dorsal, ventral and lateral body pores indistinct.

Lip region well set off from body, 1 /4 -1/3 body-widths at base of oesophagus. Amphids cup-shaped, curved slit-like apertures occupying about 1/2 of corresponding body-width. Odontostyle 1.4- 1.7 head-widths long with an aperture about 1/8th of odontostyle length. Guiding ring 0.9- 1.1 head-widths from anterior end. Odontophore 1.1 -1.3 times the odontostyle length.

Basal expanded portion of oesophagus 34-37 % of neck length. The location of the oesophageal gland nuclei and their orifices is given in Table II. Nerve ring surrounding anterior slender part of oesophagus at 44-48 % of neck length from anterior end. Cardia hemispheroid, surrounded by intestinal tissues. A well developed oesophago-intestinal disc present. Prerectum 2.5-3.5 and rectum 0.8- 1.0 anal body-widths long.

Vulva a transverse slit. Vagina extending 1 /3-2/5 across the body, encircled proximally by cuticularization and distally by sphincter muscles. Gonads amphidelphic. Uterus divided into a proximal glandular and a distal muscular part. Ovaries reflexed; oocytes arranged in single row except in growth region.

Tail 0.7-0.9 anal body-widths long, bluntly-conoid or hemispheroid, with 2 caudal pores on each side.

Male: Supplements consist of an adanal pair and 7 ventromedians, the latter spaced at irregular intervals ( Fig. 4 , I). Spicules about 1.5 anal body-widths along median axis. Lateral guiding pieces well developed. Copulatory muscle bands occupying the area up to ventromedian supplements. Four pairs of rectal glands present. Subventral papillae 7, spaced at irregular intervals. Prerectum starts from 3rd ventromedian supplements, about 3 anal body-widths long.

Type habitat and locality: Soil around roots of weeds and mosses, Rohalla Falls (altitude approx. 8,500 ft.), Manali , district Kulu , H.P.

Type specimens: Holotype mounted on slide H. A.141 Enchodelus parateresll , paratypes on slides H. A.14 / Enchodelusparateres /2-4.

Differential diagnosis: Enchodelus parateres n. sp. comes close to E. teres Thorne, 1939 and E. laevis Thorne, 1939 . It differs from the former in having a well set off and differently shaped lip region, differently shaped amphids, longer prerectum (prerectum twice the anal body-width in E. teres ), tail differently shaped and without saccate bodies, sperm present in the oviduct and in being bisexual and from E. laevis in having differently shaped and well set off lip region, differently shaped amphids, longer odontostyle (odontostyle about one head-width in E. laevis ), comparatively shorter odontophore in relation to odontostyle (odontophore about twice the odontostyle length in E. laevis ), shorter basal expanded portion of oesophagus (basal expanded portion of oesophagus slightly less than 50 % of oesophageal length in E. laevis ), and tail without saccate bodies.

Figures

Fig. 4. Enchodelusparateres n. sp. A. Female entire, B. Male entire, C. Head end, D. Head end showing amphid, E. Expanded region of oesophagus, F. Posterior female sexual branch, G & H. Female tail ends, I & J. Male tail ends, K. Spicule.