Abstract
Fresh collections of Diplopoda from China contain five new species of the large, East Asian, warm temperate to subtropical genus Riukiaria: R. martensi sp. nov., from Shaanxi Province, as well as R. belousovi sp. nov., R. kabaki sp. nov., R. korolevi sp. nov. and R. davidiani sp. nov. from Sichuan Province. A key is given to all eight Riukiaria species currently known to occur in mainland China, including R. tianmu (Tanabe, Ishii & Yin, 1996), comb. nov. ex Sinoria Tanabe, Ishii & Yin, 1996, the latter genus a new junior subjective synonym of Riukiaria, syn. nov.