Lateral fields with 4 minute incisures. Lip region set off by constriction. Spear 8u-10u long with small rounded knobs. Details of neck region as illustrated. Intestinal cells each with 2 nuclei. Esophageal glands extending back 4 times body width. Labia of vulva elevated; vagina extending in and forward; ovary with about 10 oocytes arranged in single file. Posterior uterine branch about twice as long as body width, serving as a spermatheca. Details of tails as illustrated.
Aphelenchoides obtusus is immediately distinguished among the smaller members of the genus by the rounded tails and double nuclei of intestinal cells.
Holotype, allotype and other specimens as indexed under Aphelenchoides 6.
Habitat: Prairie sod above canal west of Sidney, Montana.