Early Triassic beetle fauna (Insecta: Coleoptera) from the Eastern Siberian locality Alisa quarry showing late Permian taxa composition.

From the Lowermost Triassic locality Alisa quarry (Krasnoyarsk Territory, Tura village vicinity, Nidym Formation, Lower Triassic) insect-bearing strata of a yellowish-grey tuffaceous siltstone was located 0.5 m below the basalt flow that demarcates the Permian-Triassic border. Sixteen beetle specimens: five belonging to three Permocupedidae (Permocupedinae) species, Archicupes storozhenkoisp. nov., Cytocupes magnussp. nov., Tatarocupes brevicellularissp. nov.; one specimen belongs to new monotypic Asiocoleidae genus, Alisacupes dunaevigen. et sp. nov. Ten specimens were distributed between two Schizocoleidae genera: Uskatocoleus Rohdendorf 1961, U. turensissp. nov. and three species of Schizocoleus Rohdendorf 1961: S. frumentumsp. nov., S. maximussp. nov. and S. subtilissp. nov. Coleoptera composition in Alisa quarry locality is typical for the end Permian, showing no signs of rapid evolutionary changes at the Permian-Triassic boundary. In addition to insects, the Alisa quarry yielded abundant fern and conifer fossils, along with occasional fish scales and conchostracan shells. The site represents a paleoenvironment of shallow, ephemeral freshwater pools.