The present study is based on oribatid mite material (Acari, Oribatida) collected in 2016 from herbaceous-grassy vegetation from a ReviTec site, University of Ngaoundéré, Cameroon. A list of identified taxa, including 29species from 23 genera and 12 families, is provided; of these, one species is new to science, one species (Pseudoamerioppia barrancensis) is recorded in the Ethiopian region for the first time, and all other species are recorded in Cameroon for the first time. A new subgenus of the genus Pilizetes Sellnick, 1937 (Galumnidae), Pilizetes (Pseudopilizetes) Ermilov subgen. nov., with type species Pilizetes (Pseudopilizetes) camerunensis Ermilov sp. nov., is described. The new subgenus differs from Pilizetes (Pilizetes) by the presence of setiform notogastral setae, a complete dorsosejugal suture and bothridial setae with unilaterally dilated heads.