Helicotylenchus platyurus
Perry, 1959
Photo Galleries:
Spring Creek Prairie, NE
Konza Prairi
e, KS
Nine-mile Prairie, NE
Species Comparisons- heads
Species Comparisons- tails
Species Comparisons- entire bodies

L = 0.8 mm; a = 28; b = 6.4; c = 39  V = 60
Body usually in a rather tight spiral. Annules near lip region become narrower until five usually are present on the high conical lips. Spear about 26u long with slightly cupped knobs. Dorsal esophageal gland outlet 10u behind spear. Hemizonid about 2 annules long, anteriorly adjacent to excretory pore.  Spermagonium a prominent feature of the uterine tract, sometimes containing spermatozoa which have developed therein. Tail unusually long, dorsally arcuate with about 14 ventral annules. Phasmids 7-10 annules anterior to anus.
     Helicotylenchus platyurus is immediately recognized by the high, conical lip region with 5 annules, elongate, rounded, dorsally arcuate tail with 14-16 annules and anterior position of phasmids.
     Habitat:  About roots of cottonwood an various shrubs on bank of Sioux River 2 miles west of Brookings, South Dakota.

(Description-Thorne and Malek, 1968)

DNA Sequences Obtained
Specimen: Collected:
KonzaIII GG-109 Konza Prairie, First survey