The dataset we present consists of an inventory compiling all records and knowledge about Staphylinidae (Insecta, Coleoptera) in the Azores and is part of a long-term monitoring performed between 1990 and 2015 in different habitat types of eight islands of the Azores Archipelago. Most samples come from the BALA project (Biodiversity of Arthropods from the Laurisilva of Azores) that sampled native forests in the Azores. Additional sampled habitats include exotic forests, intensive and semi-natural pasturelands, orchards, caves and lava flows. Most of the records (about 96.7%) were collected in standardised sampling campaigns, which included pitfall traps and beating transect protocols. Non-standardised records are based on hand-collecting and sifting, as well as cave, colour and malaise traps. We provide a long-term inventory of Staphylinidae (Insecta, Coleoptera) collected in the course of several standardised sampling campaigns and recorded with non-standardised methods. We collected a total of 10744 specimens belonging to 69 identified species of Staphylinidae, which represents 51% of the species known from the Azores Archipelago. Four endemic species were sampled, representing 40% of the known Azorean endemic species. From this dataset, seven species are new for the Azores: Aleochara funebris Wollaston, 1864; Amischa forcipata Mulsant & Rey, 1873; Bledius unicornis (Germar, 1825); Carpelimus troglodytes (Erichson, 1840); Cypha seminulum (Erichson, 1839); Paraphloeostiba gayndahensis (MacLeay, 1871); Tachyporus caucasicus Kolenati, 1846. We also registered a total of 66 new island records for eight Azorean islands. This contribution continues a series of publications on the distribution and abundance of Azorean arthropods. We also provide an updated list of Azorean rove-beetles (Staphylinidae) that now includes 136 species, ten of them considered Azorean endemics.

A study of nearly 10,000 specimens of Staphylinidae collected in the Ionian island Corfu, Greece, in late spring 2017 yielded more than 233 species. Additional, previously unpublished records of 66 named species are reported from the island. Two species are described and illustrated: Borboropora corcyrana Assing spec. nov. of the Aleocharinae and Ocypus corcyranus Assing spec. nov. of the Staphylininae. As many as 118 named species are reported from Corfu for the first time, 21 of these species represent first records from Greece. One name is revalidated and six names are synonymized: Euplectus jonicus Meggiolaro, 1966 (revalidated) = E. jonicus corcyreus Meggiolaro, 1966, syn. nov.; Mycetoporus punctipennis Scriba, 1868 = M. insulanus Luze, 1901, syn. nov.; Anotylus tetracarinatus (Block, 1799) = A. corcyranus (Coiffait, 1968), syn. nov.; Bledius corniger Rosenhauer, 1856 = B. bubalus Gistel, 1857, syn. nov.; Paederus littoralis Gravenhorst, 1802 = P. pelikani Reitter, 1884, syn. nov.; Leptacinus batychrus (Gyllenhal, 1827) = Phacophallus corcyranus Bordoni, 2017, syn. nov. Including reliable previous literature records and the new records reported in the present paper, 446 named species (plus additional unnamed species) are currently known from Corfu. Thus, the known fauna of this island is significantly more diverse than those of other East Mediterranean islands, including the much larger Cyprus. A checklist of the Staphylinidae fauna of Corfu is provided. Although at present 18 species and subspecies have been recorded exclusively from Corfu, most of them are unlikely to represent island endemics; three of these species are of doubtful taxonomic status. Nomenclatural Acts Borboropora corcyrana spec. nov. – urn:lsid:zoobank.org:act:8D35093D-8EBF-4E9C-9876-AB758F4FC973 Ocypus corcyranus spec. nov. – urn:lsid:zoobank.org:act:812099FA-F72A-41E5-B96B-258F8F48639A

The Azores is a remote oceanic archipelago of nine islands which belongs to the Macaronesia biogeographical region hosting a unique biodiversity. The present Azorean landscape is strongly modified by the presence of man and only in small areas, where the soil or climate was too rough, have primitive conditions remained unchanged. Despite the fact that most of the Azorean native habitats are now lost, a large number of endemic species are still present and need urgent conservation. The present checklist of terrestrial and freshwater arthropods of the Azores Archipelago is based on all known published literature. The main goal of this work is to list, as rigorously as possible, all the known terrestrial and freshwater arthropods of the Azores. In this way, we are contributing to solve the ‘Linnaean’ shortfall, i.e. an incomplete taxonomic description of species-level diversity and the Wallacean Biodiversity Shortfall, the incomplete species distribution knowledge. The checklist includes new records of arthropods at island and archipelago levels that were published in the last twelve years. Compared to the last checklist of Azorean arthropods (Borges et al. 2010b), a total of 217 taxa (species and subspecies) are added. Currently, the total number of terrestrial and freshwater arthropod species and subspecies in the Azores is estimated to be 2420 taxa belonging to 14 classes, 53 orders, 440 families, 1556 genera, 2400 species and 149 individual subspecies. The most diverse orders of Azorean arthropods are: Coleoptera (585 taxa), Diptera (423 taxa), Hemiptera (338 taxa), Hymenoptera (163 taxa), Lepidoptera (159 taxa) and Araneae (133 taxa). A total of 276 endemic taxa are currently known (232 species and 44 subspecies), belonging to eight classes and 22 orders. São Miguel, Terceira and Pico are the islands with higher number of endemic species and subspecies. In the Azores, the number of native non-endemic taxa is 793 taxa, totalling 1069 indigenous taxa. Compared to the other nearest Macaronesian archipelagos (Madeira and Canaries), the Azorean arthropod fauna is characterised by a lower percentage of endemism (endemics/indigenous: 26% in Azores, 47% in Madeira Archipelago and 42% in Canary Islands) and a high proportion of exotic introduced taxa (39% in Azores, 19% in Madeira Archipelago and 8% in Canary Islands). Based on recent IUCN Red-listing of Azorean arthropods, a large fraction of the endemic taxa is under high threat.

Three species of the Ischnosoma spelaeum group are described and illustrated, all of them most likely with very restricted distributions: Ischnosoma acutum spec. nov. (Georgia: Svaneti, Racha); I. barbigerum spec. nov. (Georgia: Svaneti); I. molle spec. nov. (Georgia: Adjara). Type material of I. major (Luze, 1901) and I. caucasicum Kocian, 1997 is revised. Additional records of previously described species of Ischnosoma Stephens, 1829 are reported from Georgia, partly also from other regions. Seven species of the genus have reliably been recorded from Georgia, two species of the I. pictum group and widespread, five of the I. spelaeum group and with restricted distributions. The presence of an additional species of the I. spelaeum group, I. caucasicum, requires confirmation. The distributions of the species of the I. spelaeum group are revised and mapped. Several previous literature records are zoogeographically implausible and consequently probably erroneous. Nomenclatural Acts Ischnosoma acutum spec. nov. – urn:lsid:zoobank.org:act:62214E44-BF50-4608-95B5-BDDA2B0936FC Ischnosoma barbigerum spec. nov. – urn:lsid:zoobank.org:act:314DE8C9-E254-4171-A502-F710E896BCFD Ischnosoma molle spec. nov. – urn:lsid:zoobank.org:act:75E5A095-ACCC-4862-877D-76464BA33ABE

More than 540 specimens of the genus Ischnosoma Stephens (Coleptera, Staphylinidae, Tachyporinae) from Nepal are revised. Four new species are described and illustrated: Ischnosoma bhojpur Kocian & Schülke, sp. n., I. hirthei Kocian & Schülke, sp. n., I. jumla Kocian & Schülke, sp. n. and I. schmidti Kocian & Schülke, sp. n. Additional records of previously described species are reported. The distributions of the Nepalese species are mapped. Ischnosoma gratiosum (Cameron, 1932) is recorded from Nepal for the first time. A revised key to the Ischnosoma species of Nepal is presented.