Tylenchus thornei Andrdssy, 1954

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 thornei Andrdssy, 1954 ( Fig. 8 , D-E).

Tylenchus specimens resembling T.thornei were found in the majority of the samples. They evidently represent more than one species, but as generally the spear knobs have become indistinct through processing, proper evaluation was not possible. As the true thornei I regard the species which is described asfollows:

Females (n = 50): L = 0.78 mm (0.63 -0.94); a = 38 (32-47); b = 6.1 (5.4-6.8); c = 4.5 (4. 1- 5.0); V = 60 (58 -62); Gt = 26 (22-46).

One male: L = 0.70 mm; a = 36; b = 6. 1; c = 4.1.

Lip region broad, resembling that of T.davainei ; lips rather distinct. Spear heavy with large round knobs; its length rather variable, usually 14-17 fx, but sometimes 11-13 fx. Median bulb located at 40- 44% of neck length from head end. Annulation of cuticle fine but distinct. Four lateral lines. Female tail 170 jx long (141-195), its length equal to 13 (11-16) anal body widths; tail tapering to acute, sometimes slightly mucronate terminus, not filiform. Male tail 171[x long or 16 anal body widths. Length of spicules 17 [x.

This species was very numerous in samples 9, 10 and 11. The specimens in samples 3, 17, 25, 30, 32, 34, 44, 53, 54, 56, 57/58, 60, 61, 62, 67 and 69 probably also represent this species.

Figures

FIG. 8. A-C: Basiria dolichura n.sp.,female.A: neck region; B: vulva region; C: tail. D-E: Tylenchus thornei Andrâssy,female.D:neck region; E: tail.