Eudorylaimus longicardius
Thorne, 1974
Photo Gallery- Haughton Crater

1.4 mm; a = 29; b = 3.6; c = 37; V = 60
Body slightly arcuate in posterior third.  Lip region angular, set off by constriction.  Guiding ring sclerotized, refractive.  Spear 15u long with aperture 1/3 its length.  Esophagus enlarged by rather abrupt expansion near middle until 1/2 body width, gland nuclei arranged as in Eudorylaimus.  Cardia discoid, then elongate conoid with intestinal cells surrounding it almost to apex.  Intestinal lumen frequently with green or red colored contents.  Prerectum length about equal to body diameter, a pouch-like dorsal extension usually extending back over rectum.  Tail dorsally convex-conoid to rounded terminus, bearing two pairs of lateral pores.  Ovaries reflexed about 1/2 their length.  Vulva transverse, at bottom of a small round depression.  Eggs about 40 to 75u, as many as 4 being observed at one time.  Male not collected and gravid females contained no sperms.

Eudorylaimus longicardius is immediately distinguished by the posterior location of the vulva, intestinal cells surrounding the cardia and tail form.

Habitat: Collected from soil about buffalo grass roots near Farmingdale, South Dakota by James Smolik.
(Description by Thorne, 1974)