Dimensions. 12 females L = 0.78 mm a = 31 - 39
b = 4.4 - 5.8 c = 11 - 14 V = 52 - 56 Stylet 40 - 45
5 males L = 0.88 - 0.96 mm a = 36 - 46 b = 4.7 - 5.5
c = 10 - 11 T = 48 - 63 per cent Stylet 41 - 44 u long
Female (holotype). L = 0.89 mm a = 34
b = 5 c = 11 V = 55
Body cylindrical, tapering at both ends. Lip region hemispherical,
set off from body contour by depression, bearing 9 annules. Labial
sclerotization faint, inconspicuous. Stylet 44 u long, with
well-developed rounded knobs. Excretory pore opens just behind nerve
ring. Esophageal-intestinal valve large. Spermatheca containing
spermatozoa present. Tail elongate, conoid, with terminus not striated.
Cuticle coarsely striated. Lateral field with 6 incisures.
Phasmids prominent, opening at middle of tail.
Male (allotype). L = 0.92 mm a = 41
b = 5.5 c = 10 T = 60 per cent Stylet 43 u long.
Similar to female. Bursa envelops tail. Gubernaculum simple,
Type host. Soil at roots of Chaemobodium sp.
Type locality. Pyramid Ranger Station, El Dorado County,
California, elevation 5,500 feet.
Tylenchorhynchus conicus can be distinguished by the set-off
hemispherical lip region, the faint labial sclerotization, the long spear,
and the conoid female tail. This species can be separated from lineatus
superbus by the length of the spear and the length and shape of
the female tail.
(Description- Allen, 1955)