Enchodelus microdoroides, 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 : 142-144

ENCHODELUS MICRODOROIDES N. SP .

( Fig. 5 )

Measurements: See Table I .

Description:

Female: Body tapering gradually in neck region, posterior half or third curved ventrally on fixation. Cuticle finely striated, its thickness on tail tip 6 jum. Lateral chords occupying 1 /8th-1 /7th of body-width near middle. Dorsal, ventral, and lateral body pores indistinct.

Lip region set off from body, about 1 /3 body-width at base of oesophagus. Amphids cup-shaped, curved slit-like apertures occupying more than one-half to less than two-thirds of corresponding body-width. Odontostyle about 3 head-widths long; its aperture about 1 / 16th of odontostyle length. Guiding ring 2.6-3.0 head-widths from anterior end. Odontophore 1.0- 1.2 times odontostyle length.

Basal expanded part of oesophagus 34-38 % of neck length. The location of oesophageal gland nuclei and their orifices given in Table II. Nerve ring surrounding anterior slender part of oesophagus at 48- 54 % of neck length from anterior end. Cardia hemispheroid, surrounded by intestinal tissues. Prerectum 2.7-3.3, and rectum 0.8-1.1 anal body-widths long.

Vulva a transverse slit. Vagina extending about halfway across the body, encircled at proximal end by cuticularization and at distal end by sphincter. Gonads amphidelphic. Uterus divided into a proximal glandular and a distal muscular part. A round spermatheca-like structure is also present. Oviduct and uterus distinctly separated by a well developed sphincter. A prominent sphincter is also present between the ovary and oviduct pouch. Ovaries reflexed; oocytes arranged in single row except in growth region. Eggs 70 X 30 tLm.

Tail 0.7-0.8 anal body-widths long, convex-conoid, with two caudal pores on each side.

Male: Not found.

Type habitat and locality: Soil around roots of barley, Hordeum vulgare near Railway Station, Bharmar (altitude approx. 1,800 ft.), H. P.

Single specimen from soil around roots of unidentified grasses, Upper Bakrota Hills, Dalhousie (altitude approx. 7,000 ft.), H.P.

Type specimens: Holotype female along with paratype female mounted on slide H.A.6 lEnchodelus microdoroides / l.

Specimen from Upper Bakrota Hills mounted on slide H.A.107/ Enchodelus microdoroides /2.

Differential diagnosis: Enchodelus microdoroides n. sp. comes close to E. macrodorus (de Man, 1880) Thorne, 1939 ; E. hopedorus (Thorne, 1929) Thorne, 1939 ; and E. hopedoroides Altherr, 1963 . The new species differs from E. macrodorus , in having a shorter body (L = 1.47-1.60 mm in E. macrodorus ), posteriorly situated vulva (V = 42 in E. macrodorus ), differently shaped amphids and tail, longer odontostyle (about 2.0-2.5 head widths in E. macrodorus ), longer odontophore (less than 3 head-widths in E. macrodorus ), and posteriorly situated guiding ring (about 1.5 head-widths from anterior end in E. macrodorus ); it can be distinguished from E. hopedorus in having a shorter body (L = 1.43 mm in E. hopedorus ), longer odontostyle (about 2 head-widths in E. hopedorus ), longer odontophore (about 2.5 head-widths in E. hopedorus ), posteriorly situated guiding ring (about 1.2 head-widths from anterior end in E. hopedorus ), and differently shaped tail; it differs from E. hopedoroides by the smaller body (L = 1.42-1.85 mm in E. hopedoroides ), longer odontostyle (about 2 head-widths in E. hopedoroides ), longer odontophore (about 2.5 head-widths in E. hopedoroides ), and differently shaped tail.

Figures

Fig. 5. Enchodelusmicrodoroidesn. sp. A. Female entire, B. Head end, C. Head end showingamphid, D. Expanded region of oesophagus, E. Posterior female sexual branch, F. Female tail end.