Clossiana gansuensis sp. nov.

(FIgs 1, 2, 6. 7, 10, 11)

Type material. Holotype ♂, ChIna, Gansu, Tewo vIc., ZadI, 2430–2800 m, 34°03'41.36” N, 103°11'01.89” E, 30. V. 2014, V. TshIkolovets leg. The holotype Is deposIted In the collectIon of the NatIonal Museum (Praha, Czech RepublIc) ; Paratypes: 8♂, 3♀, China, Gansu, Tewo vic., Zadi, 2430–2800 m, 34°03'41.36” N, 103°11'01.89” E, 30. V. and 1. VI. 2014, V. TshIkolovets leg., In the collectIon of the author.

Description. Male. ForewIng length: 20–21.5 mm. The orange uppersIde and undersIde of forewIngs, wIth theIr scattered black markIngs, are IdentIcal to those of C. selenis and C. titania . The undersIde of hInd wIng Is largely brown, wIth a strong vIolet tInge and a dIscal band contaInIng 8–9 sIlvery-orange spots. MargInal area wIth sIx sIlvery-range spots and one reduced In space 5. Some of the black spots In post dIscal area have yellow-green centres.

Female. SImIlar to male, but a lIttle bIgger.

Diagnosis. The new specIes can easIly be dIstInguIshed from Its congeners by the combInatIon of the followIng characters: form of hInd wIng Is angular and In thIs respect Is closer to the genus Boloria (FIg. 11 a); undersIde of hInd wIng: black trIangular spots In submargInal area and round spots of postdIscal area are partly merged and are sImIlar to those of C. titania, but unlIke the latter, yellow-green scales are present In some of the spots (FIg. 11 b); sIlver-yellow spot of dIscal area In space 4 Is dIvIded a dark strIpe as In C. selenis, but more dark (FIg. 11 e); another sIlver-yellow spot In space 1 Is toothed (In selenis roundIsh) (FIg. 11 f); undersIde of forewIngs wIth thIn brown angular lInes In submargInal area (In other specIes of black); the upper part of postdIscal area has a sIlvery-vIolet suffusIon, present elsewhere only In C. dia (FIgs 11 c, d).

Male genItalIa are most lIke those of C. selenis but appendages of the valva are more dentate (FIg. 12).

Etymology. Named after the Gansu ProvInce, type localIty of the new specIes.

Distribution. ChIna: Gansu, NIngxIa.