Tetrabothrus BERNHAUER, 1915

Assing, Volker, 2016, On some Lomechusini of the Palaearctic and Oriental regions (Coleoptera: Staphylinidae: Aleocharinae), Beiträge Zur Entomologie = Contributions to Entomology 66 (1), pp. 13-111 : 93

3.9. Tetrabothrus BERNHAUER, 1915

3.9.1. General remarks

Including the new species described below and the newly proposed synonymies, Tetrabothrus currently includes 30 species (see checklist). The distribution of the genus ranges from the south of the East Palaearctic region (Himalaya, China, Japan) across the Oriental into the Australian region. Some of the species ( T. canescens , T. neoguineensis , T. papuanus , T. pubescens , T. semialatus ) are of doubtful identity, as their descriptions are based on females; a reliable identification of most Tetrabothrus species is possible only based on the morphology of the aedeagus. Several taxa are currently known only from their respective type localities. Based on available zoogeographic data, some species appear to have restricted distributions, whereas others are remarkably widespread. The latter is especially true of T. clavatus , which is distributed in most of the south of the East Palaearctic and across the Oriental regions. This species appears to be present also in the Australian region (New Guinea, Australia), but only females have been recorded so far.