Syn.: Tylenchorhynchus acutus Allen, 1955
0.75 mm; a = 35; b = 5.5; c = 23; V = 58
Body definitely arcuate when relaxed. Five lines in lateral field.
Lip region with 5 or 6 annules, set off by deep constriction. Annules
adjacent to lip region much narrower than opposite spear base. Spear
15u long with massive cupped knobs, the muscles attached to labial
arches and a sclerotized band about base of head. Eslpagus tapering
to a narrow tube where it attaches to the median bulb. Basal bulb
somewhat longer than neck width with usually one huge gland nucleus visible.
Cardia somewhat discoid, usually difficult to see because of pressure from
intestine. Hemizonid 2 annules anterior to pore. Deirids about
opposite pore. Intestine packed with large dark granules, often obscuring
details of reproductive system. Ovaries outstretched. Spermatheca
or spermagonium not observed. Eggs about 3 times as long as body
width. Tails with 15 to 20 ventral annules. Phasmids somewhat
variable in position.
Habitat: Tylenchorhynchus acutus is widely distributed
throughout the Great Plains, being the most common species of the genus.
(Description- Thorne & Malek, 1968)
DNA Sequences Obtained