Monhystera filiformis Biitschli, 1873

P. A. A. LOOF, 1971, FREELIVING AND PLANT PARASITIC NEMATODES FROM SPITZBERGEN, COLLECTED BY MR. H. VAN ROSSEN, Mededelingen Landbouwhogeschool Wageningen 71, pp. 1-86 : 57

Monhystera filiformis Biitschli, 1873 .

The second group of specimens has the amphids 1.4 - 2.7 head widths from the anterior end and is here regarded M.filiformis . Dimensions of 14 females: L = 0.29 - 0.50 mm; a = 27 - 37; b = 4. 1- 5.4; c = 3.5 -4.7; V = 1 4~ 2152 -59. Diameter of amphids 1.2-2.5 \i or 25 -40 % of corresponding body width. This form is slenderer than M. vulgaris . Length of tail equal to 9-14 anal body widths. The vulva-anus distance is 59 -91 % of tail length. The oesophagus in this form is relatively longer; the vulva on the average lies more anterior, contrary to the findings of Micoletzky (1914). A difference in development of lips between vulgaris and filiformis could not be observed.

Samples 16, 24, 26, 30, 31, 33, 34, 57, 60, 61, 65 and 66.