taxonID	type	description	language	source
B861878DFFB49B1D61FECAD0FC6FF74B.taxon	description	C o m m e n t: This Holarctic species is common also in the Caucasus region.	en	Assing, Volker (2019): New species and additional records of Ischnosoma from Georgia (Coleoptera, Staphylinidae, Tachyporinae). Linzer biologische Beiträge 51 (2): 773-788, DOI: 10.5281/zenodo.3738587
B861878DFFB49B1E61FECDB8FEA9F225.taxon	description	C o m m e n t: Based on available evidence, this recently described species is endemic to the extreme west of the Mekheti Range, Adjara region, Southwest Georgia (Map 1). Note that one of the paratypes which was collected further to the east in the Shavsheti Range in the region to the southwest of Khulo is a female-based record and consequently requires confirmation.	en	Assing, Volker (2019): New species and additional records of Ischnosoma from Georgia (Coleoptera, Staphylinidae, Tachyporinae). Linzer biologische Beiträge 51 (2): 773-788, DOI: 10.5281/zenodo.3738587
B861878DFFB79B1E61FEC85AFE76F6E9.taxon	description	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. solodovnikovi SCHÜLKE, 2001 and I. molle ASSING & 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 mm long; 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. acre is undoubtedly closely allied to I. solodovnikovi from Northeast Turkey (Trabzon, Rize) and I. molle (Southwest Georgia: Adjara: western Meskheti Range). It is distinguished from these species as follows: from I. solodovnikovi by 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 mm long; 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. molle by 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 type specimens 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.	en	Assing, Volker (2019): New species and additional records of Ischnosoma from Georgia (Coleoptera, Staphylinidae, Tachyporinae). Linzer biologische Beiträge 51 (2): 773-788, DOI: 10.5281/zenodo.3738587
B861878DFFB69B1F61FECA0CFD09F78F.taxon	description	C o m m e n t: The original description is based on type material from " Helenendorf ", a highly doubtful and most likely erroneous record based on mislabelled specimens; for a detailed argmentation see ASSING & SCHÜLKE (2017). Consequently, the true distribution was unknown. The above males represent the first record since the original description and the first record with a specified and confirmed locality. It suggests that the distribution of this species many be confined to the Trialeti Range in Southwest Georgia. However, additional records are required to confirm this.	en	Assing, Volker (2019): New species and additional records of Ischnosoma from Georgia (Coleoptera, Staphylinidae, Tachyporinae). Linzer biologische Beiträge 51 (2): 773-788, DOI: 10.5281/zenodo.3738587
B861878DFFB69B1861FECDBCFCB8F096.taxon	description	E t y m o l o g y: The specific epithet (Latin, adjective: acute) alludes to the sharply 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 4.3 mm; length of forebody 1.9 mm. Habitus as in Fig. 2. Coloration: body reddish, with the antero-median portions of tergite IV-VI slightly darker; legs dark-yellow; antennae pale-reddish. Eyes (Fig. 47) slightly longer than postocular region in lateral view, composed of some 40 - 50 ommatidia. Antenna 1.45 mm long. Pronotum 1.15 times as broad as long and 1.83 times as broad as head; disc with moderately dense micropunctation, mostly without microsculpture (nearly obsolete traces of microsculpture visible only near anterior margin). Elytra 0.82 times as long as pronotum, without microsculpture; sutural and lateral series each composed of six punctures. Abdomen with rather coarse and dense punctation, punctures somewhat sparser in postero-median portions of tergites; posterior margin of tergite VII without palisade fringe. ♂: sternite VII (Fig. 48) weakly transverse, with a distinct cluster of dense setae in postero-median portion; sternite VIII (Fig. 49) distinctly oblong, in postero-median portion with a cluster of moderately dense and rather short setae, posterior margin strongly concave; aedeagus (Figs 50 - 51) 0.68 mm long; ventral process apically extremely acute in ventral view; parameres with numerous setae in apical half. C o m p a r a t i v e n o t e s: Ischnosoma cuspidatum is distinguished from I. major, its geographically closest micropterous congener (see map 2 in ASSING & SCHÜLKE 2017) by slightly larger body size, the (near) absence of microsculpture on the pronotum and the elytra, a male sternite VII with a truncate posterior margin and with a less extensive cluster of setae in the postero-median portion, a more slender male sternite VIII with a more deeply concave posterior margin and a distinct cluster of dense setae in the postero-median portion, and by a more acute and differently shaped apex of the ventral process of the aedeagus. For illustrations of I. major see KOCIAN (1997). 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 type locality is situated to the north of Lechuri in the southern slopes of the Greater Caucasus, Kakheti region, Northeast Georgia (Map 2). The holotype was sifted from leaf litter in a stream valley with deciduous forest at an altitude of 830 m (MEYBOHM pers. comm.).	en	Assing, Volker (2019): New species and additional records of Ischnosoma from Georgia (Coleoptera, Staphylinidae, Tachyporinae). Linzer biologische Beiträge 51 (2): 773-788, DOI: 10.5281/zenodo.3738587
B861878DFFBE9B1061FECD96FD25F695.taxon	description	C o m m e n t: Ischnosoma myops is the most widespread and common Caucasian representative of the I. spelaeum group, its confirmed distribution ranging from Northeast Anatolia (Rize, Artvin) to Central Georgia, with the easternmost confirmed record at 43 ° 43 ' eastern longitude (Map 2). The habitus, forebody (lateral view), and the male sexual characters are illustrated in Figs 7 - 8, 38 - 39, 46.	en	Assing, Volker (2019): New species and additional records of Ischnosoma from Georgia (Coleoptera, Staphylinidae, Tachyporinae). Linzer biologische Beiträge 51 (2): 773-788, DOI: 10.5281/zenodo.3738587
B861878DFFB99B1161FECC8AFE19F6D5.taxon	description	E t y m o l o g y: The specific epithet (Latin, adjective) alludes to the distinctly converging apico-lateral lamellae of the median lobe of the aedeagus, one of the characters distinguishing this species from the highly similar I. parallelum. D e s c r i p t i o n: Very small species of slender habitus, body length 2.5 - 3.3 mm; length of forebody 1.2 - 1.4 mm. Habitus as in Fig. 3. Eye rudiments (Fig. 4) minute, approximately as large as antennomere I in cross-section, composed of 0 - 5 ommatidia, often with additional degenerated rudiments of ommatidia. Pronotum approximately 1.15 times as broad as long and 1.6 times as broad as head. Other external characters similar to those of I. myops. ♂: shape and chaetotaxy of sternite VII unmodified (Fig. 40); sternite VIII (Fig. 41) with sparse unmodified pubescence, posterior margin weakly concave; median lobe of aedeagus (Figs 32 - 34, 42) 0.42 - 0.45 mm long (0.50 - 0.54 mm including parameres); ventral process apically broadly convex in ventral view and obtuse in lateral view; apicolateral lamellae distinctly converging apicad; internal sac with a pair of short and broad apical and a pair of small and curved median sclerites, and with small and dark basal membranous structures. C o m p a r a t i v e n o t e s: Ischnosoma convergens is distinguished from the similar I. myops only by smaller size (I. myops: length of forebody 1.4 - 1.7 mm), a more slender habitus (I. myops: pronotum approximately 1.2 times as broad as long and 1.7 times as broad as head), smaller eye rudiments (I. myops: eyes significantly larger than antennomere I in cross-section), a posteriorly weakly concave male sternite VIII (I. myops: posterior margin truncate), and a smaller aedeagus (I. myops: aedeagus approximately 0.5 mm long, 0.6 mm including parameres) with a ventral process and internal structures of different shapes. The new species is readily distinguished from all other Caucasian representatives of the genus, except the following species, by much smaller size and smaller eye rudiments alone. For illustrations of I. myops see Figs 7 - 8, 38 - 39, 46. 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: Based on currently available data, I. convergens is endemic to Mtirala National Park and its vicinity in the extreme west of the Meskheti Range, Adjara region, Southwest Georgia (Map 3). The male paratype collected in 2017 was reported as I. myops in ASSING & SCHÜLKE (2017). The specimens were mostly sifted from litter in moist deciduous forests, often with rhododendron undergrowth; few specimens were collected by soil-washing. The altitudes range from 150 to approximately 600 m. In some localities, the species was collected together with I. myops and / or I. molle. Some of the type specimens collected in May are more or less distinctly teneral.	en	Assing, Volker (2019): New species and additional records of Ischnosoma from Georgia (Coleoptera, Staphylinidae, Tachyporinae). Linzer biologische Beiträge 51 (2): 773-788, DOI: 10.5281/zenodo.3738587
B861878DFFBB9B1361FECA7FFE53F283.taxon	description	E t y m o l o g y: The specific epithet (Latin, adjective) alludes to the more or less subparallel apico-lateral lamellae of the median lobe of the aedeagus. D e s c r i p t i o n: Habitus as in Fig. 5. Eye rudiments (Fig. 6) minute, approximately as large as antennomere I in cross-section or slightly larger, composed of 0 - 5 ommatidia, often with additional degenerated rudiments of ommatidia. In size, proportion, coloration, and other external characters practically identical to I. convergens. ♂: shape and chaetotaxy of sternite VII unmodified (Fig. 43); sternite VIII (Fig. 44) with sparse pubescence, posterior margin weakly concave; median lobe of aedeagus (Figs 35 - 37, 45) on average slightly larger than that of I. convergens; apico-lateral lamellae subparallel, weakly converging apicad at most; pair of apical sclerites longer and more slen- der, median pair of sclerites larger, and basal membranous structure larger than in I. convergens. C o m p a r a t i v e n o t e s: Ischnosoma parallelum is distinguished from the otherwise practically identical I. convergens only by the morphology of the aedeagus: the orientation of the apico-lateral lamellae, the longer and more slender apical internal structures, the larger median internal structures, and the larger basal internal structure. Based on the available males, these differences are constant. 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: Thetypespecimenswerecollected in three localities in the Machakhela National Park in the extreme west of the Shavsheti range, Adjara region, Southwest Georgia. The highly restricted distribution of I. parallelum is separated from that of I. convergens by the Acharistskali river valley (Map 3). The specimens were sifted from leaf litter or washed from soil obtained in a deciduous forest margin with rhododendron undergrowth and in stream valleys with deciduous forests (alnut, hazelnut, alder, chestnut) at altitudes of 170 - 600 m, in two localities together with I. myops.	en	Assing, Volker (2019): New species and additional records of Ischnosoma from Georgia (Coleoptera, Staphylinidae, Tachyporinae). Linzer biologische Beiträge 51 (2): 773-788, DOI: 10.5281/zenodo.3738587
