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 Plectus cornus Maggenti, 1961 . Dimensions of seven females : L = 0.49 - 0.55 mm ; a = 26-31; b = 3.6 -4.0; c = 7.7- 8.6; V = 7 - 848 -50 7 - 8. Body curved generally throughout, though less strongly than in P. acuminatus . Cephalic setae 6 \x long,i.e.as long as width of lip region; directed anteriad, the tip bent outward. Lip region somewhat truncate, lips distinct. Ampids questionmark shaped, 1.9-2.4 [x in diameter or 20- 25 % of corresponding body width; located about halfway the mouth cavity. The latter is cylindrical throughout, prostom not widened; 18-19 \L long. Cuticular annulation distinct and rather deep, especially on the tail. Tail length is equal to five or six anal body widths; the tail is bent ventrad in the proximal half, almost straight in the posterior half. These specimens, apart from being smaller, correspond well to the type specimens from Sweden . Sample 44.