A new species of Gamasiphis (Acari: Ologamasidae) from Brazil, with a key to species from the Neotropical Region

Gamasiphis paulista n. sp. is described based on specimens representing all postembryonic stages, collected from litter and soil in Piracicaba, State of São Paulo. This is the first species of Gamasiphis described from Brazil. A key is provided for the separation of species of this genus known from the Neotropical Region.