Helicotylenchus minzi Sher, 1966

Bohra, Padma, 2012, Twelve species of nematodes: new records for India, Journal of Threatened Taxa 4 (9), pp. 2889-2899 : 2892

Helicotylenchus minzi Sher, 1966

( Fig. 1, G–H and Image 4 A–B)

Material examined: Three females, 27.7.2009, Coll. P.Bohra, Reg. No. IV/2331 & 2277.

Measurements: Females: L = 0.61–0.80mm; a = 26–34; b = 5.5–6.4; c = 46–71; c´ = 0.5–1.0; V = 60–65.

Description: Female: Body in loose spiral shape. Lip region truncated, marked by 5 annules. Stylet 26– 28µm long, basal knobs indented anteriorly. Excretory pore anterior to oesophago–intestinal, junction. Hemizonid at level of excretory pore. Female reproductive system amphidelphic. Spermatheca offset; with sperms. Phasmids 2–4 annules anterior to anus. Tail more curved dorsally, terminus irregularly

hemispherical bearing 10–11 annules.

Habitat: Collected from moist soil around the bank of Pichola lake, Udaipur District, Rajasthan, India.

Remarks: H. minzi can be distinguished from H. canadiensis by having shorter stylet; (stylet 30–33µm; female tail terminus hemispherical to irregularly hemispherical with six to 12 annules in H. canadiensis ).

Helicotylenchus talonus Siddiqi, 1972 ( Fig. 1, I–J and Image 5 A–B)

Material examined: 3 females, 31.xii.2009; coll. P. Bohra, Reg.No. IV/2344.

Measurements: Females: L = 0.41–0.46 mm; a = 22–24; b = 5.8–6.5; c = 1.1–1.2; c´ = 0.8–0.9; V = 62–66.

Description: Female: Body spirally curved upon fixation. Lateral fields marked by four incisures. Lip region hemispheroid, distinctly marked by 4–5 labial annules. Stylet 19–20µm long; basal knobs large with flattened to concave anterior surface–median oesophageal bulb oval. Ovaries paired. Tail dorsally convex–conoid, with 3–7 annules ventrally and a large, bluntly rounded, claw–like unstriated ventral projection.

Habitat and locality: Collected from soil around roots of Lemon ( Citrus reticulate ) at Kakarwa, Rajasamand District, Rajasthan, India.

Remarks: H. talonus Siddiqi, 1972 comes close to H. glissus Thorne & Malek, 1968 ; H. bradys Thorne & Malek, 1968 and H. borinquensis Roman, 1965 . From H. glissus it differs in having a distinctly annulated lip region, a wider tail projection and inner incisures of the lateral fields usually fusing distally on tail. From H. bradys it can be differentiated by spear length (spear 29–33 µ long in H. bradys ), finer body annules (3µ wide at mid– body in H. bradys ) and fewer tail annules. From H. borinquensis it can be separated by its fewer tail annules, a large tail projection and phasmids which are closer to the anal level.