The oribatid mite fauna of Daikoku-Jima Island, northern Japan, was surveyed. Thirty-four families, 45 genera and 56 species of oribatid mites were recorded there. Three of these species, Hafenrefferia gilvipes (C.L. Koch, 1839), Oribella pectinata (Michael, 1885), and Eupelops curtipilus (Berlese, 1916), are newly recorded from Japan.
A male of Paraplectana tsushimensis Yamaguchi 1960 is described for the first time using specimen collected from Okinawajima Is. The mt-COI gene partial sequence data is used for the identification of the specimen.
Eight species of the family Theridiidae are reported from Brunei Darussalam. Phoroncidia lygeana (Walckenaer, 1842) is recorded for the first time and redescribed. Janula Strand, 1932 is revived from the synonymy of Episinus Latreille, 1809. Six new species of Janula, J. bruneiensis, J. bizona, J. bubalis, J. triangularis, J. batman and J. triocellata, are described. Monetoculus Wunderlich, 2008 is newly synonymised with Janula. A new genus, Brunepisinus, is erected based on a new species, B. selirong.
Two new species of jumping spiders belonging to the genus Irura Peckham & Peckham, 1901 collected from Hainan Island, China, were diagnosed, described and illustrated under the names: Irura bidenticulata sp. nov. and I. pengi sp. nov.
Five new species of the spider genus Dipoena Thorell, 1869 collected from Hainan Island, China, are recognized, described and illustrated:Dipoena bifida sp. nov. (male & female), D. longiducta sp. nov. (male & female), D. membranula sp. nov. (male & female), D. shortiducta sp. nov. (female) and D. arborea sp. nov. (female).
Two new gnaphosid species of the genera Drassyllus and Hitobia are described from Amami-ôshima Island, southwest Japan under the names of Drassyllus amamiensis and Hitobia makotoi. D. amamiensis is distinguished from D. biglobus Paik 1986 by the anterior epigynal margin slightly swollen inward in antero-lateral parts. H. makotoi is separated from H. unifascigera (B&ösenberg & Strand 1906) by the epigynum without posterior protrusion.