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The genus Bioramix Bates, 1879 from Nepal is revised. Seven valid species are distinguished, including a new one: Bioramix (Leipopleura) medvedevisp. n. from Dolpo, which was misidentified as B. (L.) politicollis (Kaszab, 1940) by the previous authors. Lectotypes for the following species are designated: Bioramix ovalis Bates, 1879, Botiras oblongulus Fairmaire, 1898, Platyscelis aenescens Blair, 1923, and Platynoscelis kochi Kaszab, 1940. Photographs of the habitus of the adults and a key to species from Nepal are given.

International audience; With 38 described species or subspecies, Gnaptorina Reitter is the second-most species-rich genus in the darkling beetle subtribe Gnaptorinina (Tenebrionidae: Tenebrioninae). In this study, we reconstructed a phylogeny of the genus based on one nuclear and three mitochondrial genes and used this phylogeny to explore the historical biography and diversification of Gnaptorina species. We implemented multiple molecular species delimitation approaches to reassess the status of Gnaptorina species and taxonomic subdivisions of the genus. Dating and historical biogeography analyses suggest an early Eocene origin of the genus, with the southeastern regions of the Tibetan Plateau most likely as areas of origin. Based on these results, we propose a new classification for Gnaptorina with three major clades identified. Consequently, the monotypic subgenus Boreoptorina is newly synonymized with the more species-rich subgenus Hesperoptorina, and G. dongdashanensis Shi is transferred from Hesperoptorina to the subgenus Gnaptorina. In addition, G. minxiana Medvedev, formerly treated as a subspecies of G. potanini Reitter, is elevated to species. Results of molecular species delimitation analyses are largely congruent and confirm the status of most morphological species.

The genus Bioramix Bates, 1879 from China is revised, 54 valid species are recognized in this study, including 23 new ones: B. (Cardiobioramix) barkamica sp. nov., B. (C.) gibbosa sp. nov., B. (C.) longicornis sp. nov., B. (C.) prolongata sp. nov., B. (C.) tenuitarsus sp. nov., B. (Leipopleura) baxoica sp. nov., B. (L.) cupreoviridis sp. nov., B. (L.) exsertigenae sp. nov., B. (L.) homoplasta sp. nov., B. (L.) impressithorax sp. nov., B. (L.) latitarsis sp. nov., B. (L.) laxipenis sp. nov., B. (L.) lhozhagensis sp. nov., B. (L.) longipilis sp. nov., B. (L.) miranda sp. nov., B. (L.) nigra sp. nov., B. (L.) rectiangulata sp. nov., B. (L.) riwoqeica sp. nov., B. (L.) rugelytra sp. nov., B. (L.) seidlitzi sp. nov., B. (L.) subcarinata sp. nov., B. (L.) tiani sp. nov., B. (L.) yushuana sp. nov. The following new synonymy is proposed based on the examination of type and additional specimens: B. (C.) globipunctata Bai & Ren, 2016 = B. (C.) liupanshana Bai & Ren, 2016, syn. n.; B. (C.) szetschuana (Kaszab, 1940) = Platynoscelis (C.) kulzeri Kaszab, 1960, syn. n.; B. (L.) integra (Reitter, 1887) = Platyscelis (Platyscelis) obovatus Ren, 1999, syn. n.; B. (L.) politicollis (Kaszab, 1940) = B. (L.) baqenensis Li & Egorov, 2016, syn. n.; B. (L.) rubripes (Reitter, 1889) = Myatis brevipilosum Meng & Ren, 2005, syn. n., formerly synonymized with B. (L.) micans Reitter, 1889; B. (L.) rufipalpis (Reitter, 1887) = Platynoscelis (Trichoplatyscelis) darbukensis Kaszab, 1940, syn. n. The subgenus Planoplatyscelis Kaszab, 1940 and B. (P.) pamirensis Bates, 1879 are recorded from China for the first time. Lectotypes are designated for Helops subaenea Reitter, 1889 and Botiras punctatellus Fairmaire, 1891. The biology of adult, larvae and pupa is briefly introduced. Furthermore, new distribution records, images of adults, male aedeagus and habitat, and a key to Chinese species are presented.

A new subgenus and four new species of the genus Gnaptorina Reitter, 1887 from China are described and illustrated: Austroptorina subgen. n. (type species Gnaptorina longicornis Li & Ren, 2004), G. (A.) polita sp. n. (Xizang), G. (B.) ampliptera sp. n. (Sichuan), G. (G.) artipenis sp. n. (Sichuan) and G. (G.) crenata sp. n. (Sichuan, Xizang). The new subgenus distributes in southeastern Xizang and western Hengduan Mountains of China, antennae and legs slender and long, protibiae slightly emarginate from middle to apex on inner side and weakly curved to inner side apically, ventral surface of protarsomeres 1–2 and mesotarsomere 1 with hairy brush in males.

Two new species of nominal subgenus of Gnaptorina Reitter, 1887 (Coleoptera, Tenebrionidae: Blaptini), G. (G.) acutangula sp. nov., G. (G.) crassitibia sp. nov., are described from the Hengduan Mountains, Western Sichuan province of China. A key to the known species of the subgenus Gnaptorina is provided.

The Chinese species of the genus Oodescelis Motschulsky, 1845 are revised. Fifteen species belonging to five subgenera are listed. O. (Acutoodescelis) emmerichi Kaszab, 1940 is proposed as subspecies of O. (A.) punctatissima (Fairmaire, 1886) [O. (A.) punctatissima emmerichi Kaszab, 1940, stat. n.]. A new synonym is established: O. (A.) pyripenis Ren, 1999 = O. (A.) punctatissima (Fairmaire, 1886), syn. n. based on the morphological characters, geographic distribution, and assessment on the molecular phylogeny [except O. (A.) pyripenis]. A new subspecies and a new species are described: O. (A.) punctatissima henanana Bai & Ren, subsp. nov. from Henan and O. (Planoodescelis) lii Bai & Ren, sp. nov. from Hubei. Lectotypes for the follwoing species are designated: Platyscelis punctatissima Fairmaire, 1886, Platyscelis (Oodescelis) affinis Seidlitz, 1893, Platyscelis (Oodescelis) brevipennis Kaszab, 1938, Platyscelis (Oodescelis) similis Kaszab, 1938, Oodescelis (Clavatoodescelis) acutanguloides Kaszab, 1940, Oodescelis (Clavatoodescelis) kuntzeni Kaszab, 1940 and Oodescelis (Clavatoodescelis) sachtlebeni Kaszab, 1940. Additional diagnostic characters of the subgenus Planoodescelis Egorov, 2004 are proposed. In addition, newly collected materials are examined, new distribution records, habitus of adults, images of male protibiae and aedeagus are provided, and a key to Chinese species is given. Furthermore, the first and preliminary molecular phylogeny of the genus is presented, and the used markers may be helpful to reconstitute the phylogenetic relations within the tribe Platyscelidini.

The genus Platyscelis Latreille, 1818 (Coleoptera: Tenebrionidae: Platyscelidini) from China is revised. Sixteen valid species (subspecies) are recognized in this study, including three new ones: P. (s. str.) acutipenis sp. nov. from Gansu and Ningxia, P. (s. str.) densipunctata sp. nov. from Gansu, and P. (s. str.) helanensis sp. nov. from Inner Mongolia and Ningxia. A synonymy between P. (s. str.) brevis Baudi di Selve, 1876 and P. ballioni Reitter, 1889 is proposed based on the examination of type and additional specimens. Lectotypes are designated for P. hauseri Reitter, 1899, P. gebieni Schuster, 1915, P. (s. str.) angusticollis Kaszab, 1940, P. (s. str.) licenti Kaszab, 1940, P. (s. str.) platytarsis Kaszab, 1940 and P. (s. str.) suiyuana Kaszab, 1940. Furthermore, new distribution records, images of adults and male aedeagus, and a key to Chinese species are presented.