The Arizonan jaguar was proposed as a subspecies of jaguar, with the taxonomic name "Panthera onca arizonensis" (Goldman, 1932), which ranged from Sonora in Mexico, to the southwestern part of United States, before 1939. In 1939, due to lack of evidence, Reginald Innes Pocock accepted that it was the same subspecies as Panthera onca centralis or Panthera onca hernandesii, before recent tests failed to establish that the jaguar was divided into different subspecies. Like other jaguars, its population faces a decline.