Arrhopalites bellingeri

Type locality: USA, Colorado, Schofield Pass. Principalis ­ group. Total length, 0.7 mm. Color dark reddish brown all over the body except intersegmental membranes and ventral surface, eyes 2 + 2. Posterior cephalic spines present. Ant. III not swollen basally. Ant. IV divided into seven subsegments. All ungues with a clear inner tooth, tunica present on hind unguis. All unguiculi with corner tooth, and apical filament exceeding the unguis tip. Dental chaetotaxy in table 3, ventral dental formula 3: 2: 1: 1. Anal valve chaetotaxy in table 2. Biogeographic zone 8 and 24 a in the Neotropical region.