Arrhopalites pygmaeus (Wankel), 1860: 203 .

Syn.: Dicyrtoma pygmaea Wankel, 1860: 203 . Dicyrtoma pygmaea Wankel, 1861: 256 –257, figs. 12–15. Sminthurus ferrugineus Packard, 1888 .

Sminthurus mamouthia Banks, 1897 .

Sminthurinus binoculatus Borner, 1901 .

Arrhopalites binoculatus Scott, 1964 nec Börner, 1901. Arrhopalites purpureus Absolon, 1899 .

Type locality: Mährischen Höhlen (cave), Germany.

(Fig. 15 A –K) Pygmaeus ­group s. str. Total length, 0.8–1.0 mm. Color white, sometimes with traces of pigmentss on the eye patch, eyes 1+1. Cephalic spines absent. Ant. III not swollen basally. Ant. IV divided into five subsegments. All ungues with inner tooth, all unguiculi with corner tooth, and apical filament exceeding the unguis tip. Dental chaetotaxy as shown in table 3, ventral dental formula 3: 2: 1: 1. Anal valve chaetotaxy as in table 2, cuticular spines absent on anal valve.

Biogeographic zone 8 and 24a in Neotropical region.