Genus Ironus
Bastian, 1865
Photo Gallery- Sand Hills fen
Photo Gallery-Konza Prairie
Syn. Cephalonema Cobb, 1893 nec Stimpson, 1857
  Nanonema Cobb in Stiles & Hassall, 1905
GEN. CHAR. Body long and narrow, tapering at extremities.  Caudal sucker absent.  Integument with delicate longitudinal markings; cephalic setae present.  Pharyngeal cavity long and narrow, having three small, movable, rounded projections near commencement.  Oesophagus cylindrical, canal indicated by three bright lines; transverse muscular fibres not distinct.  Intestine moderately well covered with hepatic cells containing light-coloured fat-particles indistinctly aggregated.  Vulva about the middle of the body.  Uterus bifid, segments suymmetrical.  Spicules-------?   Lateral canals-------? Movements very sluggish.
(Description- Bastian, 1865)

Definition:  Ironinae.  Body slender.  Cuticle without striations, setae or lateral alae.  Head offset by shallow constriction with 3 movable lips each with a small apical papilla and 4 submedian setae.  Amphids cup-like at level of head setae, apertures slit-like.  Stoma long, tubular, with 3 anterior eversible hook-like teeth.  In developing forms the 3 teeth are situated a little further posteriorly.  Excretory pore in vicinity of lips.  Oesophagus almost cylindrical but a little wider behind than in front.  Vulva equatorial; gonads paired, opposed and reflexed.  Spicules paired, arcuate, strong, with a central strengthening piece.  Gubernaculum small.  Caudal glands and terminal duct probably absent.  Tail tapering to fine point in both sexes.  A single mid-ventral seta present on male; other caudal papillae absent.

Type species:  Ironus ignavus  Bastian, 1865

DNA Sequences obtained
Specimen: Collected:
Konza 20BE-Ro-31 Konza Prairie, Second Survey
Fen JV2-1a Jumbo Valley fen Survey