Tylenchus costatus de Man, 1921

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 : 35

Tylenchus costatus de Man, 1921 .

Dimensions of 28 females: L = 0.46 -0.75 mm; a = 26- 36; b = 5.1- 7. 1; c = 5.0- 5.9; V = 1 8 ~ 3763 -68. Spear length = 11-13 pi. Males were not found. The median bulb lies at 46-49 % of neck length from head end. On the whole the Spitzbergen specimens tend to be somewhat larger than those from more southern countries.

This species, too, is common on Spitzbergen. Found in samples 16, 20, 21, 28, 36, 38, 52, 56, 61, 63, 65, 66 and 67.