Achipterina (Oribatida, Ceratokalummidae) currently comprises four species, collectively distributed in the tropical and subtropical areas. We describe a new species—A. mangrovicasp. nov.—based on adults collected from litter of a mangrove forest in the Can Gio Biosphere Reserve, southern Vietnam. It is the first representative of the family discovered in the Vietnamese fauna. The new species is characterized in having a bidentate rostrum, setiform rostral and lamellar setae, long inner tooth of lamellar cusp, unilaterally fusiform bothridial seta, long interlamellar seta, dentate anterior part of pteromorph, oval and oblique notogastral porose area Aa. The morphology of the gnathosoma, ovipositor, and legs are presented for the first time for Achipterina. An identification key and summary of distribution and habitats of the known species of Achipterina are provided. http://www.zoobank.org/urn:lsid:zoobank.org:pub:906EA4DE-A0A3-475C-B273-F8327F44832F.

Three new species of oribatid mites (Oribatida) of the superfamily Oripodoidea – Phauloppia differens sp. n. (Oribatulidae), Oripoda operta sp. n. (Oripodidae) and Pirnodus concavus sp. n. (Oripodidae) – are described, based on adults collected from the bark and tree branches of Dipterocarpus alatus and Haldina cordifolia in southern Vietnam.