| abstract | A new species of ptyctimous mites of the genus Arphthicarus (Oribatida, Steganacaridae) is described from the litter in East Tibet, China. Arphthicarus olszanowskii sp. nov. differs from Arphthicarus indicus (Bayoumi et Mahunka, 1979) by prodorsal lateral carinae absent, lamellar setae longer than half length of interlamellar setae, vestigial notogastral setae present, mentum setae h |