| abstract | The present study is based on ptyctimous oribatid mite material collected from the Oriental region (Sri Lanka, Thailand, Malaysia, Indonesia, Macau Peninsula, Taiwan). A list of identified taxa, including 33 species from 15 genera and six families, is presented. Two new species, Euphthiracarus (Pocsia) insperatus Niedbała sp. nov. (Euphthiracaridae) from Indonesia and Hoplophthiracarus paraconcinuus Niedbała sp. nov. (Steganacaridae) from Malaysia are described. Morphological additions to Mesoplophora (Parplophora) brevicarinata, Acrotritia ardua, A. paraardua, A. sterigma, Plonaphacarus kugohi, and P. protrusus are presented. Deuto- and tritonymph of Apoplophora phalerata are described. Mesoplophora (Parplophora) flavida and Indotritia (Indotritia) krakatauensis are recorded for the first time in Sri Lanka, Austrotritia robusta, Sabahtritia sarawak and Phthiracarus pygmaeus in Indonesia, Microtritia minima, Atropacarus (Atropacarus) striculus, Plonaphacarus foveolatus, and P. protrusus in Taiwan. Acrotritia mahunkai and A. paraardua are recorded for the first time in the Oriental region. |