Filenchus sandneri
(Wasilewska, 1965) Raski & Geraert, 1987
syn.: Tylenchus sandneri Wasilewska, 1965
Photo Gallery- Konza Prairie

(Wasilewska, 1965) Female: L = 0.37-0.47 mm; a = 30-43; b = 4.0- 4.8; c = 7.5-9.2; c' = 5.5-7.0; V = 73-75%; spear = 7.7-8.2 um.
Male: L = 0.43-0.44 mm; a = 42-43; b = 4.6; c = 8.4-9.1; spicules = 13 um.
(Andrássy, 1979) Paratype specimen: L = 0.47 mm; a = 40; b = 4.8; c = 8.4; c' = 7; V = 75%; spear = 7.5 um.

Cuticle very finely annulated; annules only 1 um wide on mid-body region.  Lateral fields about 1/5 of body width, with three distinct longitudinal bands.  Head 4.5 um wide at base, with inconspicuous striation; oral field plain.  Body at base of proximal end of oesophagus twice as wide as head.
Spear 7.5 um long, weak, 1.6 times longer than head diameter; basal knobs oval.  Length of spear only 1/13 of oesophagus.  Anterior portion of oesophagus (from head to posterior margin of median bulb) much shorter than posterior one, only about 40% of entire length of oesophagus.  Median bulb oval with small but distinct valvula; terminal bulb piriform.  Excretory pore before terminal bulb.  Distance between proximal end of oesphagus and vulva 2.6 times longer than oesophagus.
Vulva-anus distance 1.2 times longer than tail.  Posterior uterine sac a little shorter than body width.  Tail 56 um long, 7 times as long as anal body diameter, slightly arcuate ventrally, relatively stout, tapering slowly to the rounded terminus.
Peculiarities: Body very small, hardly curved; head not separate; cuticle extremely finely annuluated; spear very short; anterior portion of oesophagus much shorter than posterior; vulva far back; tail of moderate length, nearly cylindrical, slightly bent ventrally, with rounded tip.
(Description- Andrássy, 1979)