Arrhopalites harveyi Denis, 1933: 285 –287, figs. 101–107.

Type locality: Costa Rica, Santa Rosa, Serrin Viejo.

(Fig. 13 A –K) Caecus ­group. Total length, 1.2 mm. Color white, eyes 1+1. Posterior cephalic spinelike setae present. Ant. III not swollen basally. Ant. IV divided into 6 ringed subsegments. All ungues with inner tooth, all unguiculi with clear corner tooth, apical filament absent in the third unguiculus. Dental chaetotaxy as shown in table 3, ventral dental formula 3: 2: 2: 1: 1. Anal valve chaetotaxy as in table 2, 3+2 cuticular spines present in each side of the anal valve.

Biogeographic zone 24a.