Vol. 110 - Part III - Zoological Survey of India

10 Rec. zool. Surv. IndiaTable-1 : Measurements of Helicotylenchus wasimi n. sp. (all measurements in µm except L in mm).Morphometric characters Holotype female Paratype females Mean ± SD(n = 14)L 1.13 1.11-1.27 1.18 ± 0.04a 58 57-59 58 ± 0.3b 8.4 8.1-9.0 8.6 ± 0.3c 77 76-78 77 ± 0.4c' 0.9 0.8-1.0 0.9 ± 0.1V 71.5 71.2-72.0 71.7 ± 0.3V' 72.5 72.3-73.0 72.6 ± 0.2m 45.5 45.2-46.0 45.7 ± 0.3O 53 52.5-53.0 53.0 ± 0.3MB 61.5 61.2-62.3 61.8 ± 0.4G 112.3 11.1-12.6 11.8 ± 0.5G 29.1 8.0-9.2 8.8 ± 0.4Height of lip region 4.0 4.0-4.1 4.4 ± 0.2Width of lip region 7.5 7.1-7.9 7.6 ± 0.3Stylet length 27 26.5-27.2 27.0 ± 0.2Nerve ring from anterior end 94.5 94.3-95.2 95.0 ± 0.3Excretory pore from anterior end 102 102-103 102.4 ± 0.3Vulva from anterior end 808 808-809 808 ± 0.4Length of anterior gonad 140 139.4-140.6 140 ± 0.4Length of posterior gonad 103 102.6-103.3 102.9 ± 0.2Body width at vulva 19.5 19.4-20.2 19.8 ± 0.2Body width at anus 16 15.8-16.3 16.1 ± 0.2Tail length 15 14.3-15.5 15 ± 0.4Material examined : 27 females.Measurements : Female : L = 0.55-0.76 mm; a = 24-28; b = 5-6; c = 4-5; V = 59.5-64.0; O = 34-40; G 1= 18-23;G 2= 17-21.Description : Female : Body spiral in shape uponfixation. Cuticle with distinct transverse striations;annules 1-2 µm in width. Lateral fields one-sixth to onefourthof body width near mid-body; with four incisuresof which the inner two fuse near middle of tail. Lipregion continuous, broadly rounded and marked by 4-5 annules. Stylet 25-28 µm long; basal knobs indentedanteriorly. Excretory pore anterior to level of oesophagointestinaljunction; 2-3 annules long. Hemizonid 2annules anterior to excretory pore. Reproductive systemamphidelphic; outstretched. Vulva a transverse slit;vagina about half of the corresponding body width.Spermatheca well developed, empty. Oocytes arrangedin one or two rows. Phasmids 4-6 annules anterior toanus. Tail indented terminally; pronounced ventralprojection, 7-8 annules.Male : Not found.Habitat and locality : Specimens were collected bythe first author from rhizospheric soil of bananaplantations (Musa paradisiaca L. cv Kanthali) atMurarichak village (Sabang block), Kusumda(Mohanpur block), Maligram and Jamna (Pingla block)and Pathardaha village (Salbani block) of PaschimMedinipur District, West Bengal, India.Materials deposited : Specimens are deposited withthe National Zoological Collections of ZoologicalSurvey of India, Kolkata, West Bengal, India, underthe Registration No.WN 1280 on slides.Distribution : India (West Bengal, Tripura,Rajasthan, Andaman and Nicobar Islands), U.S.A. andBangladesh.