Description (from Thorne, 1974)
Body slightly arcuate posteriorly. Lateral field about 1/4 body width. Cuticle about 8 um thick near head. Lip region typical. Spear 21 um long with aperture 3/4 its length. Basal 2/3 of esophagus enlarged by gradual expansion. Prerectum of young female 3 times body width, that of male extending forward almost to end of supplement series. Supplements 12, rounded, irregularly spaced. Spicula with distinct ventral angle. Lateral guiding piece only 25 um long.
A single male and two immature females from forest nursery soil west of Brookings, South Dakota. Collected by R. B. Malek.
Tails of these specimens are slightly longer and cuticle thicker than those reported from Utah. Form of spicula, short gubernaculum and conoid tails distinguish them from other species in the area. A. amphidysis, Anderson, 1996 differs in thinner cuticle and form of spicula and gubernaculum. One specimen was infested by a species of Duboscquia, probably D. penetrans.
DNA Sequences Obtained
|Lava 2 PG-06||Lava Mountain, Idaho|