Photo Gallery- Nine-Mile Prairie
tapering slightly anteriorly to a broad, rounded lip
region; posteriorly it ends in an elongate, uniformly tapering tail
an abrubt minute, conoid or rounded terminus. Striaeabout 2.5u
Lateral fields with refractive crenate borders and two obscure incisures
between them. Spear
10u long, strong with large knobs, its muscles extending forward
into lip region and attached to cephalic cuticle. Deirids difficult to
see, about opposite excretory pore. Intestine with large,
refractive granules obscuring details of gonads. Posterior uterine
branchless than half as long as body width. Vulva-anus distanceslightly
longer than tail.
Male similar to female with well developed bursa and arcuate, cephalated spicula. Gubernaculum thin, trough-like.
Tylenchus cylindricollis is distinctive because of the broad head, spear muscles attached to cephalic cuticle, wide lateral fields with refractive borders and uniformly tapering tail ending in an abrupt conoid or rounded terminus.
Habitat: Native sod from summit of Medicine Butte, Parker
and Hammer, South Dakota; Stanley and Devils Lake, North Dakota; Sidney,
Powder River and Montana Route 12; North Dakota state line, Montana.