New species and additional records of Ischnosoma from Georgia (Coleoptera, Staphylinidae, Tachyporinae) Assing, Volker Linzer biologische Beiträge 2019 2019-12-20 51 2 773 788 8Y4X4 Assing, 2019 Assing 2019 [151,329,305,327] Insecta Staphylinidae Ischnosoma CoL Animalia Coleoptera 2 775 Arthropoda species acre sp. nov.  E t y m o l o g y: The specific epithet (Latin, adjective: acute) alludes to the acute apex of the ventral process of the aedeagus in ventral view. D e s c r i p t i o n: Body length 4.7-5.0 mm; length of forebody 2.1-2.2 mm. Habitus as in Fig. 1. External characters as in I. solodovnikoviSCHÜLKE, 2001 and  I. molleASSING & SCHÜLKE, 2017. Distinguished only by the male primary and secondary sexual characters. ♂: sternite VII ( Figs 17, 26-27) with a cluster of moderately dense thin setae in posteromedian portion, posterior margin truncate; sternite VIII ( Figs 18-19) with a cluster of moderately dense long and thin setae in postero-median portion, posterior margin shallowly triangularly excised; aedeagus ( Figs 9-12) approximately 0.7 mmlong; ventral process apically very acute in ventral view; internal structures shaped as in Figs 9-12. C o m p a r a t i v e n o t e s: Based on the external and the male sexual characters,  I. acreis undoubtedly closely allied to I. solodovnikovifrom Northeast Turkey( Trabzon, Rize) and  I. molle(Southwest Georgia: Adjara: western Meskheti Range). It is distinguished from these species as follows: from I. solodovnikoviby smaller body size, longer and thin setae near the median portion of the truncate posterior margin of the male sternite VII, a shorter and less slender male sternite VIII with denser pubescence in the postero-median portion, and by a smaller aedeagus ( I. solodovnikovi: 0.78-0.90 mmlong; n = 6) with a significantly more acute apex of the ventral process (ventral view) and with less strongly sclerotized internal structures of different shapes (for comparison see Figs 15-16, 23-25, 30-31); from  I. molleby longer and less stout pubescence in the postero-median portion of the male sternite VII, a male sternite VIII with a smaller, less deep, and more triangularly shaped posterior margin (broadly concave in  I. molle) and with a less distinctly delimited and less extensive cluster of much less dense and longer pubescence in the posteromedian portion, and a slightly smaller aedeagus with an apically more acute ventral process (ventral view) and with sclerotized internal structures of slightly different shapes. D i s t r i b u t i o n a n d n a t u r a l h i s t o r y: The typespecimens were found in two localities in the north slope of the Meskheti Range, Imereti region, Southwest Georgia( Map 1) at altitudes of 270-290 and 1890 m. They were sifted from chestnut leaf litter, from litter near rocks (MEYBOHM pers. comm.), and from leaf litter in a deciduous forest margin. 2595615752 2019-07-21 T, V Georgia 270 42.01389 Imereti 19 42.815556 2 775 2 Imereti holotype 2595615742 2018-05-19 Georgia 1890 41.860275 Imeretien 19 41.860275 2 775 1 1 Imeretien paratype 2595615709 2018-05-18 Georgia 290 42.01389 Baghdati 19 42.01389 Georgien 2 775 1 1 Imeretien paratype