Pungentus obscurus
Thorne and Swanger, 1936

    Lip region one-third as wide as neck base, the distinct forward pointing lips set off by constriction.  Cuticularized pieces about vestibule conspicuous.  Spear a little longer than the head width, the aperture occupying about one-third its length.  Esophagus enlarged in posterior two-fifths by very gradual expansion.  Vulva transverse, vagina extending half way across body.  Anterior uterine branch rudimentary, forming elongate pouch.  Posterior branch normal, the ovary reaching half way back to vulva.  Prerectum length slightly more than twice body width; rectum as long as tail.  The bluntly conoid tail contains about 6 pairs of very small ventrosubmedian saccate bodies.

    Diagnosis: Pungentus with the above measurements and general description.  Among the small species of Pungentus this one is distinctive principally because of its angular lips.

    Habitat: Three females from soil in a mountain park, Horse Creek, Uinta Mountains, Utah, U.S.A.