Diagnosis: Tylenchorhynchinae. Bodies cylindroid, tapering near extremities. Lip region with 5 annules, set off by deep constriction. Cephalic framework weakly developed. A refractive, perioral disc present. From this disc a slender, tubular spear guide extends back about 8u. Spear exceedingly slender, 27u long with strong sloping knobs, its muscles attached to cephalic framework. Ovaries outstretched. Spermatheca spheroid, about 1/2 body width. Post rectal blind sac extending 2/3 distance into tail. Female terminus rounded, male tail slightly arcuate, enveloped by broad bursa.
Geocenamus is distinctive because of the perioral disc from which
the slender spear guide extends back almost 1/3 length of the exceedingly
slender spear. The head and spear are reminiscent of those of Dolichodorus
rather than Tylenchorhynchus.
(Description- Thorne, 1968)
Type species: Geocenamus tenuidens Thorne, 1968
Species found: at:
|G. tenuidens||Konza Prairie|