Genus Sychnotylenchus
Rühm, 1956
Syn.: Sychnotylenchus Rühm, 1955 (= nomen
nudum)
Diagnosis
Sychnotylenchinae. Medium-sized (0.7 - 1.2 mm). Cephalic
region low, framework sclerotized; lateral sectors characteristically narrower
than the submedians; lateral lip areas slightly raised. Stylet with
strongly developed shaft, conus symmetrical with solid appearance, knobs
generally small, elongated, rarely indistinct. Precorpus gradually
widening from stylet base to near postcorpus or median bulb. Median
bulb muscular, with crescentic refractive thickenings. Basal bulb
large, offset from intestine. Excretory pore opposite median bulb
or more anterior. Renette cell just posterior to nerve ring.
Vulva far posterior at 89 - 94% of body length, lips prominent. Postvulval
uterine sac well developed. Quadricolumella with eight or more cells
in each row. Female tail short, broadly rounded. Male tail
short, conoid, completely enveloped by a large bursa. Spicules cephalated,
slender in distal two-thirds, about as long as tail. Associates of
bark beetles.
Type species
Sychnotylenchus intricati Rühm,
1956
syn.: Sychnotylenchus
intricati Rühm, 1955 (= nomen nudum)
Other species
Sychnotylenchus abietis Rühm,
1956
syn.: S. abietis
Rühm, 1955 (= nomen nudum)
S. mutici Massey, 1974
S. phloeosini Massey, 1969
S. scolyti Massey, 1969
S. ulmi Rühm, 1956
syn.: S. ulmi Rühm,
1955 (= nomen nudum)
DNA Sequences Obtained
| Specimen: |
Collected: |
| CSP1-09 |
Chadron State Park, NE |
