Geocenamus tenuidens
Thorne & Malek, 1968
L = 0.83 mm; V = 50; a = 30; b = 6.7; c = 12
Male: L = 0.80 mm; a = 37; b = 6.1; c = 12; T
= 60
Cephalic framework weakly developed. Lip
region with five annules, set off by deep constriction. A refractive,
perioral disc
present. Spear exceedingly slender, 27u long with strong sloping knobs.
Female terminus rounded. Lateral fields marked by
6 incisures. Male
tail slightly arcuate, with broad bursa.
Collection sites: prairie sod in Rugby, N. Dakota.
(Description: Thorne and Malek, 1968)
L = 0.66-1.24 mm, V = 47-57, C = 12-26, spicule length 17-27um, stylet
length 21-31um
G. tenuidens generally has a stylet less than 30um, spicules
less than 25 um, and an annulated
tail terminus. Labial regions
are very similar to G. arcticus in SEM view, and like that species,
some populations possess anterior body blocks and
others do not.
