States) Urocyon cinereoargenteus costaricensis (Costa Rica) Urocyon cinereoargenteus floridanus (Gulf states) Urocyon cinereoargenteus fraterculus (Yucatán) Urocyon cinereoargenteus furvus (Panama) Urocyon cinereoargenteus guatemalae (southernmost Mexico south to Nicaragua) Urocyon cinereoargenteus madrensis (southern Sonora, south-west Chihuahua, and north-west Durango) Urocyon cinereoargenteus nigrirostris (south-west Mexico) Urocyon cinereoargenteus ocythous (Central Plains states) Urocyon cinereoargenteus orinomus (southern Mexico, Isthmus of Tehuantepec) Urocyon cinereoargenteus peninsularis (Baja California) Urocyon cinereoargenteus scottii (south-western United States and northern Mexico) Urocyon cinereoargenteus townsendi (northern California and Oregon) Urocyon cinereoargenteus venezuelae (Colombia and Venezuela) Parasites Parasites of gray fox include trematode Metorchis conjunctus. Other common parasites that were collected on gray foxes in Texas were a variety of tapeworms (Mesocestoides litteratus, Taenia pisiformis, Taenia serialis) and roundworms (Ancylostoma caninum, Ancylostoma braziliense, Haemonchus similis, Spirocerca lupi, Physaloptera rara, Eucoleus aerophilus). T. pisiformis was the most common parasite species and was associated with frequent impacts on health. See also Cozumel fox, a recently/nearly extinct grey fox formerly found on Mexico's Cozumel Island South American gray fox, also known as the gray zorro, but only distantly related Urocyon progressus, the extinct ancestor of the gray fox References External links Carnivorans of North America Carnivorans of South America gray fox Mammals of the United States Mammals of Canada Carnivorans of Central America Mammals of Colombia Mammals of Mexico Mammals of Venezuela Fauna of northern South America Fauna of the Sierra Nevada (United States) Least concern biota of North America gray fox Symbols of Delaware Fauna of California