[2] This species was first described in 1995 by the biologists Luis Alberto Pereira, Alessandro Minelli, and Francesco Barbieri.

All specimens were collected in 1982 or 1983 from the Adolfo Ducke Forest Reserve in Amazonas state in Brazil.

Lewis reported the collection of eleven more specimens (six males and five females) of S. oligopus in 1990.

[2][6] Although S. oligopus and S. ramirezi share many features, including a similar number of legs, these two species also differ from one another in numerous respects.

[2] This species has been found in four locations in Amazonas state in Brazil, including the type locality in the Adolfo Ducke Forest Reserve.