||.8 - .85 mm
The single wing occupies a space at the middle of the body about as wide
as one of the annules of the cuticle. Each border of the wing area
also bears a wing-like element that appears as a narrow, bright line.
The annules are bordered on both sides by rows of refractive dots, one
of which lies inside the line bordering the wing area. The amphids
are small but distinct. The cephalic probolae are fringed with blunt-pointed
membranes. The labial probolae bear exceeding long terminal branches
that almost touch at the ends except on the ventral side where they are
separated in the manner figured for complexus.
The terminal branches over the cephalic axils are slightly recurved.
The only set of plates visible in the pharynx was the second, which appeared
small when compared to the size of the nema. The three posterior
sets of pharyngeal plates apparently ar undeveloped but the walls are heavily
cutinized. The median portion of the esophagus is well-developed
and the cardiac bulb is large, being two-thirds as wide as the neck.
The intestine is large and dense, completely obscuring the details of the
ovary. Vulva and anus both with prominent, elevated lips. The
slightly convex-conoid tail ends in a conical, cutinized point as long
as three of the annules immediately in front of it.
The tail of the male is longer than that of the female and bears three
pairs of pre-anal and two post-anal sub-median papillae and two pair of
lateral papillae. The spicula are strong, arcuate and tapering.
The accessory piece is half as long as the spicula, slightly arcuate, thin
From decaying alfalfa crowns Greeley, Colorado.
(Description- Thorne, 1925)