Stenus praedator sp. nov. from the Philippines and a new species group in Stenus Latreille, 1797 (Coleoptera: Staphylinidae, Steninae) Author Mainda, Tobias text Zootaxa 2020 2020-04-03 4759 3 405 412 journal article 10.11646/zootaxa.4759.3.6 a4b4f815-6b23-4430-8970-056cf3b60b80 1175-5326 3741262 7F3C0290-C75B-4814-BE7D-87762F4C4B6E Key to the species of the S. heterocerus group 1 Pronotum moderately finely and sparsely punctured (Figs 13, 16)............................................... 2 - Pronotum coarsely and densely punctured (Figs 14, 15, 17, 18)................................................. 3 2 Elytral punctation sparser and less coarse ( Fig. 4 ). Aedeagus ( Fig. 9 ). 6.6 mm . Negros................ S. inflaticollis Puthz - Elytral punctation denser and coarser ( Fig. 1 ). Pronotum (Fig. 13). Aedeagus unknown. 6.5–7.0 mm. Samar .............................................................................................. S. heterocerus L. Benick 3 Pronotum without impunctate areas (Fig. 14). Abdominal segments posteriorly enlarged. ♂ : metafemur with node-shaped dila- tion in basal third ( Fig. 2 ); aedeagus ( Fig. 11 ). ♀ : legs unmodified. 6.0– 7.5 mm . Mindanao......... S. thaumatocerus Puthz - Pronotum with some impunctate shiny areas................................................................ 4 4 Interstices of pronotum and elytra wider. Body with Prussian blue hue. ♂ : parameres not extending beyond apex of median lobe ( Fig. 8 ). 6.5–7.5 mm : Leyte ............................................................ S. ernstjuengeri Puthz - Interstices of pronotum and elytra narrower. Body black. ♂ : parameres extending beyond apex of median lobe........... 5 5 Punctation of frons less sparse ( Fig. 3 ). ♂ : apical portion of median lobe longer and less broad ( Fig. 7 ). 7.4 mm . Mindanao..................................................................................... S. praedator sp. nov. - Punctation of frons sparser ( Fig. 6 ). ♂ : apical portion of median lobe shorter and broader. 7.5 mm . Mindanao..................................................................................................... S. quatei Puthz