Monhystera stagnalis Bastian, 1865

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 : 56

Monhystera stagnalis Bastian, 1865 .

Two females. Dimensions: L = 1.14-1.24 mm; a = 28; b = 5.1- 5. 5; c = 5.3- 5.7; V = 32 - 3360-62.

Body stout, tapering hardly anteriorly, the head end very broadly truncate. Cuticle smooth. Length of subcephalic setae 6- 7 \i or not quite one-third of corresponding body width. Body diameter at base of oesophagus 1.5 X width of lip region. Head end without distinct lips. Body with four rows of submedian setae measuring about one-sixth of body width. Diameter of amphids 6 \x; they are slightly wider than long and located 24 \L or 0.9 head width behind the anterior end. Oesophagus very thick, the posterior part slightly expanded, though not bulbiform; the posterior part filled with large branched glands. Width of amphids equal to one-quarter of corresponding body width. Distance from vulva to anus equal to 100 - 125 % of tail length. Tail 8 -9 anal body widths long, tapering in anterior half, cylindroid in posterior. Rectum measuring about 90 % of anal body width, Spinneret present. Vulva lips somewhat protruding; body contracted ventrally behind vulva. Oocytes arranged into multiple rows anteriorly.

Sample 5.