Geostiba (Sibiota) prominens nov.sp. (Figs 34-37)

T y p e m a t e r i a l: Holotype ♂: " Kyrgyzstan: Issyk-Kul, SE Kyzyl-Tuu, 2750 m (Picea schrenkiana -forest) N42°03'54'' E077'08'22'', 22.06.2011, leg. J. Frisch / Holotypus ♂ Geostiba prominens sp. n. det. V. Assing 2019" (MNB).

E t y m o l o g y: The specific epithet (Latin, adjective: prominent, standing out) alludes to the shape of the crista apicalis of the aedeagus.

D e s c r i p t i o n: External characters (Figs 34-35) as in G. frischi, distinguished only by the sexual characters:

♂: elytra (Figs 34-35) near suture not elevated, with dense and somewhat granulose punctation; abdominal tergite VII with pair of very weakly indicated carinae in posteromedian portion; posterior margin of tergite VIII weakly concave in the middle; sternite VIII strongly convex posteriorly; median lobe of aedeagus (Figs 36-37) 0.28 mm long; crista apicalis long and triangularly produced at base of ventral process (lateral view); internal sac without spines; paramere of similar shape as that of G. frischi .

♀: unknown.

C o m p a r a t i v e n o t e s: Geostiba prominens is distinguished from other Sibiota species recorded from Kyrgyzstan particularly by the shape of the crista apicalis in lateral view.

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 in East Kyrgyzstan, to the south of Issyk-Kul lake. The holotype was sifted in a Picea schrenkiana forest at an altitude of 2750 m.