Key to the males of Saetherolabis Andersen et Mendes

1. AR <1.0; caudal lobe of inferior volsella narrow, straight, nearly parallel-sided in basal two-thirds, apically tapering, about 5 μm wide medially (Andersen & Mendes 2007, Fig. 85). Brazil, Amazonas.............. S. pectinata Andersen et Mendes

– AR> 1.15; caudal lobe of inferior volsella broad, with broadly rounded apex, more than 10 μm wide medially............ 2

2. Transverse sternapodeme curved with oral projections barely indicated; oral branch of inferior volsella digitiform, straight, almost perpendicular to caudal branch; superior volsella well developed, broadly rounded (Fig. 6). Brazil, São Paulo............................................................................................... S. iperuype sp. n.

– Transverse sternapodeme straight with strong oral projections; oral branch of inferior volsella strongly bent, apical one-half almost parallel to caudal branch; superior volsella barely indicated (Fig. 12). Brazil, Sergipe.............. S. siriype sp. n.