Genus Discolaimium
Thorne, 1939
Photo Gallery- Costa Rica

Dorylaiminae Predacious.  Body rather cylindrical from anus to middle of neck.  Cuticle marked by easily visible transverse striae.  Lip region discoid, set off by deep constriction, of almost the same width as the adjecent head which is about one-half as wide as the neck base.  An inner circlet of six rounded liplets about the vestibule.  Guiding ring of spear far forward in pharynx, like that of Discolaimus.  Lateral cords with a conspicuous series of gland-like organs.  Anterior portion of esophagus very slender, without visible radial musculature, frequently set off by a slight constriction.  Posterior portion of esophagus cylindrical, frequently with a sheath-like membrane about its base.  Dorsal esophageal gland located about one body width behind the esophageal constriction with its outlet distinctly farther forward than that of Discolaimus.  Vulva a small, transverse slit, the labia lacking the inner cuticularization found in Dorylaimus.  Vagina extending one-fourth to one-third across the body, refractive, subspherical.  Ovaries two in all known species.   Spicula and supplements dorylaimoid.

Type speciesDiscolaimium cylindricum  Thorne, 1939.

DiagnosisDorylaiminae with the above general description.  The genus differs from Discolaimus, its most closely related genus, in that the lip region is not wider than the adjacent neck, the anterior esophagus is more slender and without visible musculature and sometimes set off by constriction and the pore of the dorsal esophageal gland is located somewhat farther forward.

(Description- Thorne, 1939)

Specimens from Costa Rica
    ?Discolaimium sp. (1)