The Madrean alligator lizard (Elgaria kingii) is a species of lizard in the family Anguidae. The species is endemic to the southwestern United States and adjacent northwestern Mexico. Etymology The specific name, kingii, is in honor of Phillip Parker King, an Australian-born Royal Navy officer who surveyed the coast of South America. Geographic range Elgaria kingii is found from southeastern Arizona and southwestern New Mexico, United States, southward to Jalisco, Colima, Nayarit, southeastern Zacatecas, and southwestern Aguascalientes, Mexico. Subspecies Three subspecies are recognized as being valid, including the nominotypical subspecies. Elgaria kingii ferruginea Elgaria kingii kingii Elgaria kingii nobilis Nota bene: A trinomial authority in parentheses indicates that the subspecies was originally described in a genus other than Elgaria. References Further reading Baird SF, Girard C (1852). "Characteristics of some New Reptiles in the Museum of the Smithsonian Institution". Proc. Acad. Nat. Sci. Philadelphia 6: 125-129. (Elgaria nobilis, new species, p. 129). Boulenger GA (1885). Catalogue of the Lizards in the British Museum (Natural History). Second Edition. Volume II. ... Anguidæ ... London: Trustees of the British Museum (Natural History). (Taylor and Francis, printers). xiii + 497 pp. + Plates I-XXIV. (Gerrhonotus kingii, pp. 274–275). Gray JE (1838). Catalogue of the Slender-tongued Saurians, with Descriptions of many new Genera and Species. Ann. Mag. Nat. Hist., First Series 1: 274-283, 388-394. (Elgaria kingii, new species, pp. 390–391). Smith HM, Brodie ED Jr (1982). Reptiles of North America: A Guide to Field Identification. New York: Golden Press. 240 pp. . ("Elgaria kingi [sic]", pp. 86–87). Stebbins RC (2003). A Field Guide to Western Reptiles and Amphibians, Third Edition. The Peterson Field Guide Series ®. Boston and New York: Houghton Mifflin. xiii + 533 pp. . (Elgaria kingii, pp. 334–335 + Plate 41 + Map 124). Webb RG (1962). "A New Alligator Lizard (Genus Gerrhonotus) from Western México". Herpetologica 18 (2): 73-79. (Gerrhonotus kingi [sic] ferrugineus, new subspecies). Elgaria Reptiles of Honduras Reptiles described in 1838 Taxa named by John Edward Gray