Amydria effrentella is a moth of the Acrolophidae family. It is found in North America, including Alabama, Arizona, Arkansas, California, Georgia, Illinois, Indiana, Kentucky, Maryland, Massachusetts, Minnesota, Mississippi, Nevada, New Brunswick, New Jersey, New York, North Carolina, Ohio, Quebec, Saskatchewan, South Carolina, Tennessee, Utah, West Virginia and Wisconsin. The wingspan is about 24 mm. The forewings are mottled and there is a dark patch at the end of the discal cell. The larvae are probably subsoil root feeders or detritivores.