Geostiba (Sipalotricha) zerchei, Pace, 1996

Assing, Volker, 2019, A revision of Geostiba of the West Palaearctic region. XXVII. New species from Georgia and Kyrgyzstan, and additional records (Coleoptera, Staphylinidae, Aleocharinae), Linzer biologische Beiträge 51 (2), pp. 717-730: 720

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Geostiba (Sipalotricha) zerchei


Geostiba (Sipalotricha) zerchei   PACE, 1996 ( Figs 8-12 View Figs 8-14 )

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: 3♂♂, 5♀♀, Trialeti Range , S Bakuriani, 41°42'21''N, 43°30'08''E, 2090 m, birch trees at tree line, litter and grass sifted, 6.VII.2019, leg. Assing & Schülke ( MNB, cAss) GoogleMaps   ; 1♂, 4♀♀, same data, but 10.VII.2019, leg. Assing (cAss) GoogleMaps   .

C o m m e n t: In the original description, which is based on a unique female (erroneously sexed as a male) from "Cauc. Min. Bor., Trialetskij Chreb, Bakuriani, 1800-2200 m ", PACE (1996) assigned the species to Lioglutosipalia SCHEERPELTZ, 1951, now a synonym of Sipalotricha SCHEERPELTZ, 1931. Based on a revision of the holotype, Assing (2005) treated G. zerchei   as a species of doubtful status and moved it to Sibiota   .

During a field trip to Southwest Georgia, Michael Schülke and the author succeeded in collecting a series of specimens including males in the environs of the type locality, thus rendering a clarification of the identity of G. zerchei   finally possible. An examination of the males revealed that the species does not belong to Sibiota   , but to Sipalotricha. The male is characterized by a pronounced sutural carina on the elytra (unique in the subgenus) ( Fig. 9 View Figs 8-14 ). The external and sexual characters are illustrated in Figs 8-12 View Figs 8-14 .