The genera of Oriental Agathidinae are revised and a fully illustrated dichotomous key is presented. New generic concepts are proposed for Bassus Fabricius, 1804 and Hypsostypos Baltazar, 1963. Bassus is restricted to a clade with an Old World distribution and the remaining members are divided amongst the resurrected genera Camptothlipsis Enderlein, 1920, Lytopylus Förster, 1862, and Therophilus Wesmael, 1837. The concept of Hypsostypos is restricted and the new genus Amputostypos Sharkey, gen. n. is proposed to include species formerly included in Hypsostypos that do not have raised antennal bases. Troticus Brullé, 1846 is reported from the Oriental region for the first time. Eighteen genera are recognized for Thailand and neighboring areas, i.e., Agathis Latreille, 1804, Amputostypos, Aneurobracon Brues, 1930, Bassus, Biroia Szépligeti, 1900, Braunsia Kriechbaumer, 1894, Camptothlipsis, Coccygidium Saussure, 1892, Cremnops Förster, 1862, Disophrys Förster, 1862, Earinus Wesmael, 1837, Euagathis Szépligeti, 1900, Gryochus Enderlein, 1920, Hypsostypos, Lytopylus Förster, 1862, Therophilus, Cremnoptoides van Achterberg & Chen, 2004, and Troticus. Identification keys to the genera are provided as a standard textual dichotomous key, as well as online keys in three different formats (conventional dichotomous, DELTA/Intkey, Lucid, and MX) to enable users to choose their prefered platform and to allow direct comparisons of the technologies for producing online keys. Publication of underlying data (data matrices, character states table, and images) under the OpenDataCommons license (ODbl) (http://www.opendatacommons.org/licenses/odbl/1.0/) for DELTA/Intkey files (doi: 10.3897/zookeys.21.271.app.1.ik), primary DELTA files (10.3897/zookeys.21.271.app.2.ik) Lucid3 (LIF3) and Lucid SDD key data files (doi: 10.3897/zookeys.21.271.app.3.ik) and MX MySQL database files (doi: 10.3897/zookeys.21.271.app.4.ik) allows future workers to edit keys and to add newly described taxa. The data files for the keys published and stored on the publisher’s website and in e-archives have the rights of “first publication” identified by its bibliography data, location and citation. Readers should cite the first published version and the day of accession in case they use future online versions of the same key. The concept of publication, citation, preservation, and re-use of data files to interactive keys under the open access model is discussed in a forum paper published in the present issue (doi: 10.3897/zookeys.21.274).
