Basiria dolichura, 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 : 37

Basiria dolichura n.sp. ( Fig. 8 , A -C).

Dimensions:

Females (n = 6): L = 0.82 -0.93 mm; a = 37-48; b = 6.4- 7.2; c = 3. 1-4.0; V = 1 3 - 27 52- 571 - 2.

Female, holotype: L = 0.93 mm; a = 48; b = 7.1; c = 3.6; V = 14552.

Male not found.

Body slender, nearly straight in death, tail in some specimens curved to ventral side. Cuticular annulation 1 \L wide, distinct. Lateral field one-quarter as wide as body, with four longitudinal lines. Lip region narrowed, conoid, with distinct slit-like amphid apertures. Spear about 11 JJL long, with narrow lumen and very small basal knobs. Dorsal oesophageal gland orifice 3.5 JA behind base of spear. Median oesophageal bulb ovate, located at 40- 42 % of neck length from head end. Isthmus very long and thin, terminal bulb pyriform. Nerve ring anterior to middle of isthmus. Excretory pore at about three-quarter of isthmus. Hemizonid narrow, two annules long, located one to three annules anterior to excretory pore. Tail tapering proximally, filiform distally, its length 220-276 \x or 16-23 anal body widths. Vulva transverse, vagina one-half of body width deep. Rudiment of posterior gonad about one body width long. Anterior gonad outstretched, uterus long and thin, spermatheca oval to rectangular, empty.

Holotype: Female on slide WT 1215 . Paratypes: Five females on slides WT 1216-1218 .

Type habitat and locality: Sample 8. Paratypes from samples 7, 40 and 57/58.

This species shares the anterior location of the median bulb with B. tumida (Colbran, I 960), B.duplexa (Hagemeyer & Allen, 1952) and B.flandriensis Geraert, 1968 (see key of Geraert, 1968). From B. tumida it differs by the filiform tail, from B.duplexa by much longer tail (T/ABW being 12 in duplexa ), anterior vulva position (against 64-73 %) and empty spermatheca and absence of males; from B.flandriensis by larger and slenderer body, anterior vulva (against 63- 71 %) and much longer tail (T/ABW being 10 in flandriensis ).

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.