Two new millipede species of the genus Riukiaria (Diplopoda, Polydesmida, Xystodesmidae) endemic to the Ryukyu Archipelago, Japan Author Korsós, Zoltán Author Nakamura, Yasuyuki Author Tanabe, Tsutomu text Zootaxa 2011 2877 55 68 journal article 10.5281/zenodo.277567 8b3c1d83-f60c-4704-9a6d-ea9b7af4d28d 1175-5326 277567 List of Riukiaria species 1. Riukiaria anachoreta Tanabe, 1988 — Japan , Kyushu, Kagoshima Prefecture, Kagoshima City, Yoshida 2. Riukiaria bifida ( Takakuwa, 1942 ) — Japan , Ryukyus, Kagoshima Prefecture, Amami-O-shima Island 3. Riukiaria capaca Wang and Zhang, 1993 — China , Fujian Prov., Jangle County 4. Riukiaria chelifera ( Takakuwa, 1941 ) — Japan , Ryukyus, Okinawa Prefecture, Ishigaki-jima Island 5. Riukiaria chinensis Tanabe, Ishii and Yin, 1996 — China , Zhejiang Prov., Tian-mu Mts. 6. Riukiaria cohaesiva ( Wang, 1957 ) — Taiwan , Taipei County, "Urai" (= Wulai) 7. Riukiaria contigua ( Wang, 1957 ) — Taiwan , Taipei County, "Urai" (= Wulai) 8. Riukiaria cornuta ( Haga, 1968 ) — Japan , Kyushu, Kumamoto Prefecture, Kuma District, Mt. Gongen-yama 9. Riukiaria datei ( Miyosi, 1957 ) — Japan , Shikoku, Ehime Prefecture, Minamiuwa District, Ka-shima Island 10. Riukiaria diacantha (Miyosi, 1952) — Japan , Shikoku, Ehime Prefecture, Kitauwa District, Aizi (=Kihoku Town) 11. Riukiaria falcifera Verhoeff, 1936 — Japan , Ryukyus, Okinawa Prefecture, Okinawa-jima Island 12. Riukiaria geniculata ( Takakuwa, 1941 ) — Japan , Kyushu, „Nagasaki” 13. Riukiaria holstii ( Pocock, 1895 ) — Japan , Ryukyus, Okinawa Prefecture, Okinawa-jima Island 14. Riukiaria jamila Tanabe, 1990 — Japan , Ryukyus, Kagoshima Prefecture, Yaku-shima Island 15. Riukiaria marinae ( Golovatch, 1978 ) — Japan , Kyushu, Nagasaki Prefecture, Unzen City, Obama 16. Riukiaria montana ( Haga, 1968 ) — Japan , Kyushu, Fukuoka Prefecture, Kitakyushu City, Mt. Sarakura-san 17. Riukiaria ochracea ( Gressitt, 1941 ) — Taiwan , „Sozan” 18. Riukiaria puella Tanabe, 1988 — Japan , Ryukyus, Kagoshima Prefecture, Yaku-shima Island 19. Riukiaria pugionifera Verhoeff, 1936 — Japan , Ryukyus, Okinawa prefecture, Okinawa-jima Island 20. Riukiaria rosulans ( Tömösváry, 1885 ) — Japan , Kyushu, „Nangasaki” 21. Riukiaria scutata ( Takakuwa, 1942 ) — Japan , Ryukyus, Kagoshima Prefecture, Amami-O-shima Island 22. Riukiaria semicircularis ( Takakuwa, 1941 ) —In the original description the type locality was not specifically designated. However, in the list of localities given there Kagoshima [City] is the first, then followed by Honshu (north to Ishikawa Prefecture) of Japan , and Busan of South Korea . Riukiaria semicircularis hosidei (Miyosi, 1952) — Japan , Honshu, Yamaguchi Prefecture, Hagi City, Kasayama 23. Riukiaria spiralipes ( Takakuwa, 1942 ) — Japan , Ryukyus, Okinawa Prefecture, Kume-jima Island 24. Riukiaria taiwana ( Takakuwa, 1942 ) — Taiwan , Taichung County, Taichung 25. Riukiaria uncata ( Haga, 1968 ) — Japan , Honshu, Yamaguchi Prefecture, Mine District, Shibuki 26. Riukiaria uraensis ( Wang, 1956 ) — Taiwan , Taipei County, "Urai" (= Wulai) In addition to the 26 nominal species and one subspecies above (some of them may turn out to be synonyms of each other), the following two species can probably also be assigned to Riukiaria : “ Pachydesmus ” attemsi Wang, 1960 ( Taiwan , Yan Ming Shan), and Sinoria tianmu Tanabe, Ishii and Yin, 1996 ( China , Zhejiang Prov., Tian-mu Mts.). Here we present the descriptions of two new species, both from the Ryukyu Archipelago which gave its name to the entire genus ( Verhoeff 1936 ).