The gray checkered whiptail (Cnemidophorus dixoni) is a species of lizard native to the United States in southern New Mexico and western Texas, and northern Mexico. Some sources consider it a subspecies of the common checkered whiptail, Cnemidophorus tesselatus, whereas others grant it full species status. It is one of many lizard species known to be parthenogenetic. The epithet dixoni is in homage of renowned herpetologist James R. Dixon, which leads some sources to refer to it as Dixon's whiptail.