Mycotrupes retusus is a species belonging to the family Geotrupidae ("earth-boring scarab beetles"), in the order Coleoptera ("beetles"). The species is generally known as the "sandhills earth boring scarab beetle". It is found in North America.
References
Further reading Arnett, R. H. Jr., M. C. Thomas, P. E. Skelley and J. H. Frank. (eds.). (21 June 2002). American Beetles, Volume II: Polyphaga: Scarabaeoidea through Curculionoidea. CRC Press LLC, Boca Raton, Florida . Richard E. White. (1983). Peterson Field Guides: Beetles. Houghton Mifflin Company. Ross H. Arnett. (2000). American Insects: A Handbook of the Insects of America North of Mexico. CRC Press.