. "Arizona, Churchilla, Coluber, Elaphis, Epiglottophis, Pityophis, Rhinechis, Spilotes" . . . . . "Pituophis is a genus of nonvenomous colubrid snakes commonly referred to as gopher snakes, pine snakes, and bull snakes, which are endemic to North America."@en . . "Pituophis"@en . . . . . .