The Quino checkerspot (Euphydryas editha quino) is native to California and Mexico. It is a subspecies of the common Edith's checkerspot (Euphydryas editha) and the second such subspecies to be listed under the federal Endangered Species Act. This species, like many others, has undergone several changes in nomenclature and classification. It was originally described as Melitaea quino in 1863 and then in 1929 it was reduced to a subspecies of Euphydryas chalcedona. In 1998 it was concluded through Behr's 1863 description that it should be classified as E. editha, not E. chalcedona. The species was synonymous with E. editha wrighti, a junior synonym for E. e. quino, thus becoming scientifically accepted as E. editha quino.