Achromadora cf. semiarmata Altherr, 1952

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 : 53-55

Achromadora cf. semiarmata Altherr, 1952

( Fig. 17 , A -B).

Dimensions of seven females: L = 0.38 -0.51 mm; a = 23 -26; b = 5.2-6.0; c = 5.5-8.2; V = 42-45.

These specimens differ from Altherr's description in that the rectum measures three instead of two anal body diameters. From A.ruricola (de Man, 1880) , which they resemble in general dimensions and in the structure of the mouth cavity, they differ by the amphids containing 1.5 convolution against 2.5; by the long rectum, the anterior half of which is strongly inflated, the lumen remaining distinct; shorter cephalic setae; and by the tail being bent laterad or laterodorsad in its distal part. (Cf. Fig. 17 , E - F).

Samples 1, 27, 28, 33, 34, 37, 66 and 68.

Figures

FIG. 17. A-B: Achromadora semiarmala Altherr, female.A: neck region; B: tail. C-D: A.tenax (de Man), female. C: neck region; D: tail. E-F: A.ruricola(de Man),female.E: neckregion; F: tail.