Tylenchorhynchus acutus


L = 0.75 mm; V = 58; c=23

Five lines in lateral field. Lip region with 5 or 6 annules, set off by deep constriction. Spear 15u long with massive cupped knobs. Esophagus narrows to a narrow tube where it attaches to the median bulb. Usually one large gland nucleus visible in the basal bulb. Eggs about three times body width. Spermatheca or spermagonium not observed. Tails with 15 to 20 ventral annules.Tylenchorhynchus acutus is widely distributed throughout the Great Plains, being the most common species of the genus.

TOP notes: This species is common in western Nebraska. Its found in cultivated fields and in rangeland. As far as I can tell, the only way to differentiate it from T. acutoides is by the absence of males.

ITS1 primer set: Produces a 530 bp fragment. Specimens from Nebraska and Arizona observed.