explorans Chamberlin, 1914:192–193 .

Holotype (MCZ); type locality: Madeira­Mamore R. R. camp 39 on Rio Madeira, Rondônia, Brazil .

Original rank: species. Current rank and status: subspecies of S. angulata Newport, 1844 (Bücherl 1974, Schileyko 2002).

Anatomical illustrations: none.

Distribution: Brazil (Rondônia, Mato Grosso) (Bücherl 1974, Schileyko 2002). Maps: none.

Remarks: Bücherl (1942 a) regarded S. explorans as a full species.