(1) Background: Beetles in the superfamily Scarabaeoidea are one of most important groups Coleoptera. They found various ecosystems all over world and belong to coprophagous, necrophagous, saproxylophagous, phyllophagous rhizophagous types. The aim study is describe fauna distribution Republic Mordovia (central part European Russia); (2) Methods: was conducted from 2003 2023. Collection materia...