A new flightless genus of Thaumastodinae from Australia (Coleoptera: Limnichidae) Author Hernando, Carles text Zootaxa 2023 2023-07-13 5315 6 559 566 http://dx.doi.org/10.11646/zootaxa.5315.6.3 journal article 58998 10.11646/zootaxa.5315.6.3 07e24e1d-4f4b-4a25-a1a4-d95a6daa5648 1175-5326 8142492 DCD0C570-9808-4198-9998-BBAFD4764982 Key to the genera of the subfamily Thaumastodinae 1. Tarsal formula 4–5–5; legs slender; antennal insertions situated near eyes; metaventrite short, not covering metacoxae; riparian habitats; Palearctic and Oriental regions............................................ Acontosceles Champion, 1924 - Tarsal formula 4–4–4; legs stout; antennal insertions situated near mandibles; metaventrite projecting posteriorly, covering metacoxae; terrestrial, riparian and intertidal habitats......................................................... 2 2. Eyes round and widely separated, distance between eyes larger than the diameter of an eye; terrestrial, not associated with riparian habitats; Australian Region ................................................... Austramastodus gen. nov. - Eyes elongated and close together, distance between eyes always narrower than the maximum length of an eye; riparian and intertidal habitats..................................................................................... 3 3. Frons between eyes distinctly and arcuately projecting anteriad, narrow; male protarsi enlarged; riparian habitats; Palearctic, Oriental and Australian regions.................................................... Pseudeucinetus Heller, 1921 - Frons only gently projecting anteriad, wide; male protarsi not enlarged; intertidal habitats............................ 4 4. Antennae 7-segmented; genal antennal groove absent; Neotropical Region..................... Martinius Spilman, 1959 - Antennae 11-segmented; genal antennal groove present; Palearctic, Oriental, Australian/Pacific and Neotropical regions...................................................................................... Mexico Spilman, 1972