Xantusiidae: Xantusia vigilis Zacatecas: Ahuachila: (MVZ Herp-236360 - 25[grados] 5'7.20"N 102[grados]37'51.60"W; MVZ Herp-236361 - 25[grados] 5'7.20"N 102[grados]37'51.60"W; MVZ Herp-236362 - 25[grados] 5'7.20"N 102[grados]37'51.60"W; MVZ Herp-236363 - 25[grados] 5'7.20"N 102[grados]37'51.60"W; MVZ Herp-236364 - 25[grados] 5'7.20"N 102[grados]37'51.60"W; MVZ Herp-236365 - 25[grados] 5'7.20"N 102[grados]37'51.60"W).
Testing species boundaries in an ancient species complex with deep phylogeographic history: genus Xantusia (Squamata: Xantusiidae).
Fossil material identified as "Iguanidae or
Xantusiidae" from the early Miocene Boron Local Fauna in San Bernardino County, California (Whistler 1984) cannot be definitively referred to either taxon at this time; we examined the material and it is too fragmentary to be informative.