Mesodorylaimus lissus
Thorne, 1974
Photo Gallery- Konza Prairie

Measurements (from Thorne, 1974)
L = 1.6 mm; a = 32; b = 5.9; c = 6.0; V = 42
L = 1.6 mm; a = 34; b = 4.1; c = 45; T = 63

Description (from Thorne, 1974)
Female neck and tail of about equal length.  Lip region well set off, 1/4 as wide as neck base.  Spear 16 um long with aperture about 1/3 its length.  Guiding ring usually seen as double, especially when spear is partly extruded.  Esophagus enlarged near middle by gradual expansion.  Microvilli not seen.  Cardia elongate conoid, variable in length.  Intestinal cells filled with very fine brownish granules.  Vulva longitudinal.  Ovaries reflexed 2/3 their length.  Uteri packed with spermatozoa.  Prerectum 2-3 times as long as body width.  Rectum length twice anal body diameter.  A portion of the extremely fine filiform tail sometimes missing.
    Male with 20 low, flat, adjacent supplements.  Spicula typical, about 40 um long.  Prerectum extending forward about 3 body widths anterior to range of supplements.  At least 3 pairs of caudal pores present.  Ventrosubmedian papillae not observed.
    Habitat: A single collection of 4 females and 1 male from river bank soil near Parker, South Dakota.