Body arcuate, twisting anteriorly until amphids usually are seen from a dorsoventral view. Spear length about 10u with 2u aperture. Esophagus enlarged in posterior 2/3 to 3/5. Muscular sheath appparently not spiral. Anterior rudimentary uterine branch varying from a slender flaccid tube to a slightly enlarged chamber with cellular extensions 2-3 times as long as body width. Prerectum 6-8 times as long as body width. Tail varying from almost hemispherical to bluntly convex conoid. Males unknown.
Axonchium solitare is identified by its size, very narrow, twisted lip region, slender spear with short aperture and monosexuality.
Habitat: Common in prairie sod from many localities in North and South Dakota, eastern Montana and from Moosomin, Saskatchewan and Hadashville, Manitoba, Canada. Usually only 1 or 2 specimens in a collection.