Ischnosoma myops (Eppelsheim, 1880)

Assing, Volker, 2019, New species and additional records of Ischnosoma from Georgia (Coleoptera, Staphylinidae, Tachyporinae), Linzer biologische Beiträge 51 (2), pp. 773-788 : 784-785

Ischnosoma myops (EPPELSHEIM, 1880) ( Figs 7-8 , 38-39, 46 , Map 2 )

M a t e r i a l e x a m i n e d: GEORGIA: S a m t s k h e - J a v a k h e t i: 2♀♀, Trialeti Range , SW Bakuriani, 41°43'54''N, 43°30'21''E, 1800 m, deciduous forest with predominant beech and alder, litter near small stream sifted, 7.VII.2019, leg. Assing & Schülke ( MNB, cAss) ; 4♂♂, 1♀, same data, but 10.VII.2019, leg. Schülke ( MNB) ; 3♂♂, 1♀, Trialeti Range , S Bakuriani, 41°43'08''N, 43°29'35''E, 1880 m, forest with predominant alder and Tussilago undergrowth, litter near small stream sifted, 7.VII.2019, leg. Assing & Schülke ( MNB, cAss) ; 8♂♂, 10♀♀, Trialeti Range , S Bakuriani, 41°43'11''N, 43°29'41''E, 1870 m, forest with predominant alder, litter near small stream sifted, 7.VII.2019, leg. Assing (cAss) ; 2♂♂, 3♀♀, Trialeti Range , S Bakuriani, 41°43'22''N, 43°29'53''E, 1850 m, forest with predominant beech and alder, litter sifted, 7.VII.2019, leg. Assing & Schülke (cAss, MNB) ; 2♂♂, 3♀♀, Trialeti Range , N Bakuriani, E Tsaghveri, 41°47'25''N, 43°32'27''E, 1150 m, stream valley with mixed forest, litter near stream sifted, 8.VII.2019, leg. Assing & Schülke ( MNB, cAss) ; 7♂♂, 8♀♀, Trialeti Range , N Bakuriani, E Tsaghveri, 41°47'22''N, 43°32'29''E, 1170 m, mixed forest margin, litter on scree sifted, 8.VII.2019, leg. Assing & Schülke ( MNB, cAss) ; 2♂♂, 1♀, Trialeti Range , SW Bakuriani, 41°43'14''N, 43°28'33''E, 1640 m, gallery forest (predominantly alder) and grassland with scattered trees, litter sifted, 10.VII.2019, leg. Schülke ( MNB) ; 1♂, 2♀♀, Trialeti Range , SW Bakuriani, 41°43'54''N, 43°30'10''E, 1820 m, moist mixed forest (alder, pine), litter sifted, 10.VII.2019, leg. Assing (cAss). I m e r e t i: 1♂, N Sairme, 41°57'N, 42°46'E, 630 m, 18.V.2018, leg. Brachat & Meybohm (cAss) ; 6♂♂, 4♀♀, S Sairme , 41°53'N, 42°46'E, 1420 m, 20. V.2018, leg. Brachat & Meybohm (cAss) ; 2♂♂, 1♀, S Sairme , 41°53'N, 42°46'E, 1360 m, 20. V.2018, leg. Brachat & Meybohm (cAss) ; 74♂♂, 36♀♀, Meskheti Range , Zakari pass SE Sairme, 41°50'15''N, 42°49'27''E, 2290 m, moist slope with rhododendron and bushes, litter sifted, 20.VII.2019, leg. Assing & Schülke ( MNB, cAss, cFel) ; 2♀♀, Meskheti Range , SE Sairme, 41°52'07''N, 42°46'53''E, 1820 m, degraded forest with predominant spruce, litter of Acer and Sambucus sifted, 20.VII.2019, leg. Assing & Schülke ( MNB, cAss) ; 1♂, 1♀, Meskheti Range , N Sairme, 41°57'24''N, 42°46'10''E, 650 m, moist deciduous forest with predominant alder and chestnut, litter sifted, 21.VII.2019, leg. Assing (cAss) ; 19♂♂, 11♀♀, Meskheti Range , S Sairme, 41°52'46''N, 42°46'22''E, 1510 m, stream valley, moist deciduous forest margin, litter and herb roots sifted, 22.VII.2019, leg. Assing & Schülke (cAss, MNB) ; 1♂, 2♀♀, same data, but soil washing (cAss) ; 2♀♀, Meskheti Range , S Sairme, 41°52'10''N, 42°47'41''E, 1670 m, stream valley with predominant alder, ash, and Tussilago and fern undergrowth, litter sifted, 23.VII.2019, leg. Assing (cAss) ; 1♀, Meskheti Range , S Sairme, 41°52'29''N, 42°46'57''E, 1560 m, stream valley with predominant alder and Tussilago undergrowth, litter sifted, 23.VII.2019, leg. Assing (cAss). G u r i a: 1♀, Kvaghba-Zoti, 41°54'25''N, 42°25'44''E, 680 m, stream valley with water fall and with deciduous forest, litter sifted and soil-washing, 16. V.2019, leg. Brachat & Meybohm (cAss). A d j a r a: 1♂, Chakvistavi, 41°40'47''N, 41°52'19''E, 330 m, stream valley in deciduous forest, litter sifted, 17. V.2019, leg. Brachat & Meybohm (cAss) ; 1♂, W Chakvistavi , 41°41'48''N, 41°49'29''E, 90 m, stream valley with rhododendron, litter sifted, 18. V.2019, leg. Brachat & Meybohm (cAss) ; 1♂, 1♀, W Chakvistavi , 41°40'42''N, 41°51'10''E, 220 m, stream valley with deciduous forest (old alder and elm trees), litter sifted, 18. V.2019, leg. Brachat & Meybohm (cAss) ; 1♀, E Chakvistavi , 41°40'44''N, 41°53'09''E, deciduous forest, litter sifted, 400 m, 19. V.2019, leg. Brachat & Meybohm (cAss) ; 1♀, E Chakvistavi , 41°40'38''N, 41°52'38''E, 380 m, dry forest litter sifted, 19. V.2019, leg. Brachat & Meybohm (cAss) ; 2♂♂, E Chakvistavi , 41°40'34''N, 41°52'30''E, 320 m, rhododenron litter sifted, 20. V.2019, leg. Brachat & Meybohm (cAss) ; 1♂, 1♀, Gomismta , 41°50'21''N, 42°08'34''E, 1520 m, secondary forest with laurel, rhodondron, and Carpinus, litter sifted, 22. V.2019, leg. Brachat & Meybohm (cAss) ; 1♂, Chakvistavi , 41°41'N, 41°44'E, 170 m, 22.V.2018, leg. Brachat & Meybohm (cAss) ; 2♀♀, Shavsheti Range , SW Khulo, 41°34'38''N, 42°14'59''E, 1110 m, slope with walnut, hazelnut, and fern, herbs, and grass undergrowth, sifted, 13.VII.2019, leg. Assing (cAss) ; 1♂, Shavsheti Range , SW Khulo, 41°34'52''N, 42°15'35''E, 700 m, forest margin, litter and roots sifted, 13.VII.2019, leg. Assing (cAss) ; 10♂♂, 10♀♀, Meskheti Range , NNW Khulo, 41°47'19''N, 42°17'25''E, 2010 m, mixed beech and spruce forest, forest margin, beech litter, mushroom, and debris in ditch with Tussilago sifted, 14.VII.2019, leg. Assing & Schülke ( MNB, cAss) ; 1♂, 2♀♀, Shavsheti Range , SE Batumi, Machakhela National Park, 41°28'55''N, 41°51'29''E, 680 m, stream valley with alder, hazelnut, chestnut, and rhododendron, litter sifted, 16.VII.2019, leg. Assing (cAss) ; 4♂♂, 2♀♀, Shavsheti Range , SE Batumi, Machakhela National Park, 41°28'47''N, 41°51'31''E, 700 m, stream valley with alder and rhododendron, litter sifted, 17.VII.2019, leg. Assing (cAss) .

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 .

Figures

Map 2: Confirmed distribution of Ischnosoma myops (black circles) and type locality of I. cuspidatum (white star).

Figs 1-8: Ischnosoma acre (1), I. cuspidatum (2), I. convergens (3-4), I. parallelum (5-6), and I. myops (7-8): (1-3, 5, 7) habitus; (4, 6, 8) head and pronotum in lateral view. Scale bars: 1-3, 5, 7: 1.0 mm; 4, 6, 8: 0.5 mm.

Figs 40-46: Ischnosoma convergens (40-42), I. parallelum (43-45), and I. myops (46): (40, 43) male sternite VII; (41, 44, 46) male sternite VIII; (42, 45) apical portion of median lobe of aedeagus in ventral view. Scale bars: 40-41, 43-44, 46: 0.2 mm; 42, 45: 0.1 mm.