A new species and new records of Cephennomicrus Reitter on the island of Okinawa (Coleoptera, Staphylinidae, Scydmaeninae)

Thirteen nominal species of Cephennomicrus Reitter are currently known to occur in Japan, and five of them inhabit Okinawa-jima. One more Okinawan species, Cephennomicrus crypticus sp. n. is described. New distributional data are given for C. disjunctus (Jaoszyski, S. Arai & K. Arai), C. nagoanus Jaoszyski, and C. okinawanus (Jaoszyski, S. Arai & K. Arai). For comparative purposes, habitus and aedeagi of all species known to occur on Okinawa Island are illustrated.