FREELIVING AND PLANT PARASITIC NEMATODES FROM SPITZBERGEN, COLLECTED BY MR. H. VAN ROSSEN Author P. A. A. LOOF Department of Hematology, Agricultural University, Wageningen, The Netherlands text Mededelingen Landbouwhogeschool Wageningen 1971 1971-12-31 71 1 86 journal article 10.5281/zenodo.8152982 dc936e39-ea56-4501-b5ba-a24d055276c8 8152982 85C9CB49-EEA1-467B-ACC7-7C11B9EDEEAD Prismatolaimus stenolaimoides n.sp. ( Fig. 19 ). Dimensions: Females (n = 4): L = 0.37 -0.39 mm ; a = 32 -41; b = 3.8 -4.1; c = 3.3 -3.5; V = 6 - 1244-465 - 7. Female, holotype : L = 0.37 mm ; a = 39; b = 3.8; c = 3.3; V = 6467. Buccal cavity 4 [x long, 1.2 fx wide, relatively very narrow. Head end somewhat rounded; width of head 5 jx. Amphids opening 20 (x behind the head end. Cephalic setae arranged into a circle often; about 4 \i long. Gonads paired, opposed, usually asymmetrical. Tail length equal to 15 - 18 anal body widths. FIG. 19. Prismatolaimus stenolaimoides n.sp. , female, entire specimen. Holotype : Female on slide WT 1169 . Paratypes : Three females on slides WT 1170-1171 . Type habitat and locality: Sample 34. This species shares the very narrow mouth cavity with P. stenolaimus de Man, 1921 . This species is insufficiently known, because de Man did not give any indications about vulva position or number of gonads. P. stenolaimus is much longer ( 0.67 mm ) and slenderer (a = 70), with relatively shorter oesophagus (b = 4.5-4.6) and longer tail (c = 2.5-2.75).