Arrhopalites amarus Christiansen, 1966 : 62

Zeppelini, Douglas, 2006, The genus Arrhopalites Börner, 1906 (Collembola, Appendiciphora, Arrhopalitidae) in the Neotropical Region, with description of four new cave species from Brazil, Zootaxa 1124, pp. 1-40 : 32

Arrhopalites amarus Christiansen, 1966: 62 –63, figs. 26, 43, 57, 73, 90, 93.

Type locality: USA, Illinois, Volo.

( Fig. 16 A –K) Pygmaeus ­group s. str. Total length, 1.0 mm. Color white, eyes 1 + 1. Strong posterior cephalic spines present. Ant. III not swollen basally. Ant. IV divided into six subsegments. All ungues with a small inner tooth, tunica present in the second and third ungues. All unguiculi with corner tooth, apical filament exceeding the unguis tip on first and second unguiculi. Dental chaetotaxy in table 3, ventral dental formula 3: 2: 1: 1. Anal valve chaetotaxy in table 2, cuticular spines absent on anal valve.

Biogeographic zone 8 and 24 a in Neotropical region.