Microppia minus (Paoli, 1908)
Specimens examined: Cerro Otto - under A. chilensis, soil XI-2006 (8).
Remarks: Originally described from Italy as Dameosoma minus Paoli.
Previously reported from Argentina [as Oppia minutissima Sellnick] in the province of Chubut (Balogh & Csiszár 1963). First record for the province of Río Negro.