Genus Coomansinema
Ahmad & Jairajpuri, 1989
Diagnosis:  Body 0.8 - 1.4 mm long.  Cuticle thick, with fine transverse striations.  Lip region amalgamated, truncate, continuous with body or set off by slight depression.  Labial and post-labial sclerotization absent.  Amphids with stirrup-shaped fovea.  Guiding ring single.  Odontostyle massive, wide, usually thickened at tip, ventral arm slightly bent near middle, aperture about one-third length.  Odontophore rod-like.  Expanded part of esophagus 40-47% of esophageal length; S1N at some distance from each other, S2N far from base of esophagus.  Cardia short, hemispheroid.  Female reproductive system amphidelphic, the two genital branches equally developed and functional.  Vulva longitudinal; vagina with strong distal sclerotization.  Male with dorylaimoid spicules, lateral guiding pieces and 12-15 ventromedian supplements arranged in a series.  Female tail short, convex-conoid or cylindroid with broadly rounded tip and slight projection.  Male tail short, conoid, with rounded tip.

Type and only species:  Coomansinema dimorphicauda Ahmad & Jairajpuri, 1989

(Description- Ahmad & Jairajpuri, 1992)

Species found             at:
C. brevicauda Costa Rica