Rugilus (Rugilus) gansuensis ROUGEMONT 1998

Assing, V., 2013, A revision of Palaearctic and Oriental Rugilus. III. Five new species from the Palaearctic region and additional records (Coleoptera: Staphylinidae: Paederinae), Linzer biologische Beiträge 45 (1), pp. 171-190 : 178

Rugilus (Rugilus) gansuensis ROUGEMONT 1998

( Map 1 )

Material examined China: Shaanxi 11♀♀ [partly teneral], SW Meixian, Qinling Shan , 34°02'N, 107°24'E, 1870 m, N-slope, secondary deciduous forest, near stream, litter and grass sifted, 26.VII.2012, leg. Assing & Schülke ( cAss, cSch). Gansu: 3♂♂, 13♀♀ [partly teneral], N Chengxian, W-Qinling Shan, 34°08N, 105°47'E, 1750 m, moist valley with stream and ponds, meadow with Artemisia, 28.VII.2012, leg. Assing & Schülke ( cAss, cSch); 2♂♂, 3♀♀ [partly teneral], N Chengxian, W-Qinling Shan , 34°08'N, 105°47'E, 1760 m, N-slope, secondary deciduous forest margin, sifted, 28.VII.2012, leg. Assing & Schülke ( cAss, cSch) ; 1♀ [teneral], N Chengxian, W-Qinling Shan , 34°08'N, 105°47'E, 1760 m, heap of rotting bamboo, sifted, 28.VII.2012, leg. Assing ( cAss) ; 4♂♂, 19♀♀ [partly teneral], N Chengxian, W-Qinling Shan , 34°10'N, 105°43'E, 1850 m, mixed secondary forest margin, litter sifted, 29.VII.2012, leg. Assing, Schülke & Wrase ( cAss, cSch) ; 6♂♂, 12♀♀ [partly teneral], N Chengxian, W-Qinling Shan , 34°10'N, 105°42'E, 1830 m, stream valley with secondary deciduous forest, moist litter sifted, 29.VII.2012, leg. Assing, Schülke & Wrase ( cAss, cSch) ; 1♂, 6♀♀ [partly teneral], N Chengxian, W-Qinling Shan , 34°10'N, 105°42'E, 1830 m, stream valley with secondary deciduous forest, moist litter sifted, 29.VII.2012, leg. Assing ( cAss) ; 4♂♂, 5♀♀ [partly teneral], mountains SE Longnan, 33°11'N, 105°14'E, 2060 m, N-slope with scree, shrub litter and moss sifted, 7.VIII.2012, leg. Assing & Wrase ( cAss, cSch) ; 1♀ [teneral], mountains SE Longnan, 33°11'N, 105°14'E, 2060 m, N-slope with scree, nest of Formica chinensis sifted, 7.VIII.2012, leg. Assing ( cAss).

Comment Rugilus gansuensis is widespread in the Qinling Shan westwards to the Bailong river ( Map 1 ), its distribution parapatrically bordering on that of R. confluens . Previous records from the Daba Shan ( ASSING 2012a) are exclusively based on females and require confirmation. The species is subject to a pronounced sexual wingdimorphism; males are macropterous, females micropterous. The sex ratio is strongly biased in favour of females. Only 31 (15.6 %) in a total of 199 specimens examined so far are males. Several of the above specimens are teneral (end of July, beginning of August).

Figures

Map 1: Distributions of Rugilus gansuensis ROUGEMONT (triangles), R. confluens ASSING (diamonds), R. meilixuensis ASSING (circles), and R. atronitidus nov.sp. (star), based on examined records. Filled symbols: male-based records; open symbols: female-based records.