In 2009, a fossil beetle was found in the Pennsylvanian of Mazon Creek, Illinois. This put the origin of the beetles back to . Fossils from this time have been found in Asia and Europe, for instance in the red slate fossil beds of Niedermoschel near Mainz, Germany. Other fossils have been found in Obora, Czech Republic and Tshekarda in the Ural Mountains, Russia. The first discoveries from North America in Oklahoma were published in 2005 and 2008.