Description (from Thorne, 1974):
Body slightly arcuate, ventrally bent posteriorly
in male. Lateral field about 1/3 body width without visible cells.
Lip region angular with conspicuous papillae. Spear 20 um long with
aperture 1/3 its length. Guiding ring refractive, 1/4 head width.
Esophagus expanded rather abruptly in basal 3/7. Cardia conoid, about
as long as body width. Intestine with fine, dark, refractive granules.
Vulva longitudinal. Ovaries reflexed about 1/2 their length.
Uteri forming huge spermatheca packed with sperms; as many as 5 eggs observed
in one female. Prerectum length about twice body diameter.
Rectum slightly longer than tail. Spicula unusually long, extending
to a point almost opposite first supplement.
Eudorylaimus andrassyi is distinctive because
of its size, tail forms, and especially number and arrangement of
supplements.
Habitat: Grain field, Barnesville, Minnesota;
and about roots of young willows, Behrens Ranch, South Dakota.