1 literature reference for Proprioseiopsis levis (Wainstein, 1960):

Author: Wainstein, B.A.
Year: 1960
Title: New species and subspecies of the genus Typhlodromus Scheuten (Parasitiformes, Phytoseiidae) of the USSR fauna [in Russian]
Source: Zoologicheskii Zhurnal, Russia, 39, 683–690.