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The genus Acetalius Sharp currently contains two species from Japan. In this paper, a third species, A. grandis Yin & Li, sp. n., is described from eastern China. The foveal pattern of Acetalius, and polymorphism and major diagnostic features of A. grandis are figured. An updated key to Acetalius species is provided. [ABSTRACT FROM AUTHOR]

Five Trogloneta species from Southwest China and Japan are reviewed that two new combinations and a new synonymy are proposed in the current paper: T. nojimai (Ono, 2010), comb. n. is transferred from Mysmena, T. yunnanense (Song & Zhu, 1994), comb. n. (= T. denticocleari Lin & Li, 2008, syn. n.) is transferred from Pholcomma of the Theridiidae, T. speciosum Lin & Li, 2008, T. uncata Lin & Li, 2013, and T. yuensis Lin & Li, 2013. The female of T. yuensis is described for the first time. An identification key and diagnoses are provided for these species, as well as new photographs or illustrations of the genital organs and habitus of T. yuensis and T. yunnanense. [ABSTRACT FROM AUTHOR]

The East Palaearctic and North Oriental species of the genus Psyttalia Walker (Hymenoptera, Braconidae, Opiinae) are reviewed. Three new species are described and illustrated: P . latinervis Wu & van Achterberg, sp. n. and P . majocellata Wu & van Achterberg, sp. n. from China, and P . spectabilis van Achterberg, sp. n. from Japan. Coeloreuteus formosanus Watanabe, 1934, Opius (Lissosema) proclivis Papp, 1981, O. (Psyttalia) subcyclogaster Tobias, 1998, O. (P.) darasunicus Tobias, 1998, O. (P.) cyclogastroides Tobias, 1998, Psyttalia extensa Weng & Chen, 2001, and Rhogadopsis longicaudifera Li & van Achterberg, 2013, are new synonyms of Psyttalia cyclogaster (Thomson, 1895); Opius (Psyttalia) ophthalmicus Tobias, 1977, and O. (P.) brevitemporalis Tobias, 1998, of Psyttalia carinata (Thomson, 1895) and both O. (P.) vacuus Tobias, 1998, and O. (Lissosema) longurius Chen & Weng, 1995, of Rhogadopsis mediocarinata (Fischer, 1963). Phaedrotoma daghestanicum (Telenga, 1950), Rhogadopsis mediocarinata (Fischer, 1963) and R. mystica (Fischer, 1963) are new combinations. New records are Psyttalia carinata (Thomson, 1895) from the Netherlands and Norway, and P . cyclogaster (Thomson, 1895) from Japan. A lectotype is designated for Psyttalia carinata (Thomson, 1895) and P . cyclogaster (Thomson, 1895). A key to the East Palaearctic and North Oriental species of the genus Psyttalia Walker is included. [ABSTRACT FROM AUTHOR]

The small, basically Oriental family Opisotretidae is rediagnosed, reclassified, and shown to comprise the following seven genera, all keyed: Carlotretus Hoffman, 1980, with two species, including C. triramus sp. n. from southern China; Corypholophus Attems, 1938, with two species, one in Vietnam, the other in the Ryukyus, Japan; Martensodesmus Golovatch, 1987, with eight species, all keyed, including M. cattienensis sp. n. from southern Vietnam, as well as M. bedosae sp. n. and M. spiniger sp. n. from southern China; Opisotretus Attems, 1907, with seven species, all keyed, including O. beroni sp. n. and O. hagen sp. n., both from Papua New Guinea, O. deharvengi sp. n. from Sulawesi, Indonesia, and O. spinosus sp. n. from Nusakambangan Island, off Java, Indonesia; Opisthoporodesmus Silvestri, 1899, with six nominate species; Retrodesmus Chamberlin, 1945, with two species, i.e. the type-species R. dammermani Chamberlin, 1945, from Java, Indonesia, revised from the holotype, and R. cavernicola sp. n., from Papua New Guinea; and Solaenaulus Attems, 1940, with two species. Comments are presented on the family's possible relationships and palaeogeographic history. Instead of being considered as the sole component of the superfamily Opisotretoidea, the Opisotretidae is believed here to form one of the families of the diverse superfamily Trichopolydesmoidea, perhaps the sister-group to, if not immediately derived from, the pantropical family Fuhrmannodesmidae. The origin of Opisotretidae, previously dated as far back as the Triassic (220 Ma) in relation to the fragmentation of eastern Gondwanaland, mainly in the region of present-day Indonesia, could have had nothing to do with Gondwanaland. Opisotretids might have originated in mainland Southeast Asia well within the Cenozoic, with subsequent dispersals along the Himalayas in the West and across Indonesia (including New Guinea) in the East, also reaching as far north as the Ryukyus, Japan and Guangxi, southern China. [ABSTRACT FROM AUTHOR]