Alaimus depressus, A..L O O F, 1971

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 : 61

Alaimus depressus n.sp. (Fig. 20).

Dimensions:

Female, holotype: L = 0.86 mm; a = 44; b = 3.9; c = 12; V = 43 1 6.

Female, paratype: L = 0.94 mm; a = 46; b = 4.3; c = 13; V = 43 1 3.

Body coiled into spiral shape in death. Excretory'pore 11 jx from head end. Amphidial sensillae located 51- 56 \L behind head end, or 65- 70 % of the distance from head end to nerve ring. Cuticle smooth, 1 fx thick. Oesophagus widened in posterior seventh. The nerve ring surrounds the oesophagus at 36 - 37 % of its length from head end. Gonad single, posterior. Vagina perpendicular to body axis. The outstanding feature of this species is the peculiar depression of the ventral cuticle immediately behind the vulva. Tail 7 anal body widths long, curved ventrad, terminus subdigitate. Walls of rectum heavily cuticularized.

Holotype: Female on slide WT 1219. Paratype: One female (broken) on slide WT 1220.

Type habitat and locality: Sample 63.