Allopatric speciation illustrated: The hypogean genus Geotrechus Jeannel, 1919 (Coleoptera: Carabidae: Trechini), with description of four new species from the Eastern Pyrenees (Spain)

The specimen of Geotrechus seijasi used for the molecular part of the work (MZB 2014-2433) was collected during a campaign of the project “Actuacions de seguiment de les poblacions d’invertebrats protegits cavernicoles” of the MZB and funded by the “Direccio General del Medi Natural i Biodiversitat”, Generalitat de Catalunya, 2014. AF was supported by the German Research Foundation (DFG project FA1042/1-1)