Additions to the ptyctimous mite fauna (Acari, Oribatida) of Taiwan

The present study is based on ptyctimous oribatid mite material collected in Taiwan in 2018 and 2019. Four new species—Oribotritia chiayiensis Niedbala sp. nov. (Oribotritiidae), Phthiracarus liaoi Niedbala sp. nov. (Phthiracaridae), Plonaphacarus paraprotrusus Niedbala sp. nov. (Steganacaridae), and Notophthiracarus diamphidios Niedbala sp. nov. (Steganacaridae)—are described. Supplementary description of Acrotritia hauseri (Euphthiracaridae) is provided. A list of other identified ptyctimous mite taxa, including 10 species from six genera and five families, is presented. Four species (A. hauseri, A. mahunkai, Phthiracarus gibber, and P. parmatus) are recorded for the first time in Taiwan.