Geocenamus superbus
(Allen, 1955) Fortuner & Luc, 1990
Syn.: Tylenchorhynchus superbus Allen, 1955
Merlinius superbus (Allen, 1955) Siddiqi, 1970
Nagelus superbus (Allen, 1955) Siddiqi, 1979
Pathotylenchus superbus (Allen, 1955) Eroshenko & Volkova, 1987
Photo Gallery- Allotype and Paratype

Dimensions.  1 Female  L = 1.12 mm  a = 28  b = 5.6  c = 22  V = 56  Stylet 67 u long
                    3 Males  L = 1.05 - 1.12 mm  a = 35 - 40  b = 5.2 - 5.7  c = 12 - 15  Stylet 62 - 67 u long
Female (holotype).  Dimensions given above.  Body cylindrical, tapering at anterior end.  Lip region hemispherical, set off from body contour by constriction, bearing 8 annules.  Labial sclerotization inconspicuous.  Stylet extremely well developed, 67 u long, with conspicuous rounded knobs.  Orifice of dorsal esophageal gland 4.6 u behind spear base.  Median bulb elongate-oval.  Excretory pore opens behind nerve ring.  Esophageal-intestinal valve large, hemispherical.  Spermatheca not seen.  Tail short, cylindrical, with terminus bluntly rounded, not striated.  Cuticle coarsely annulated.  Lateral field with 6 incisures.  Phasmids prominent, opening slightly posterior to middle of tail.
Male (allotype).  L = 1.12 mm.  a = 37  b = 5.4  c = 12  Stylet 63 u long.
Similar to female.  Phasmids at middle of tail. Bursa envelops tail. Gubernaculum simple, ventrally curved.
Type host.  Soil at roots of Pinus attenuata and Arctostaphylos sp.
Type locality.  Moraga Ridge, Contra Costa County, California.

Tylenchorhynchus superbus can be distinguished by the very long stylet, the six lines in the lateral field, and the short female tail.  This species resemble conicus, from which it is separated by the longer stylet and shorter tail.
(Description- Allen, 1955)