Dodatak:Popis gmazova, X
Xa uredi
Xantusia Baird, 1859 uredi
- Xantusia arizonae Klauber, 1931 [1]
- Xantusia bezyi Papenfuss, Macey & Schulte, 2001 [1]
- Xantusia bolsonae Webb, 1970 [1]
- Xantusia extorris Webb, 1965 [1]
- Xantusia gilberti Van Denburgh, 1895 [1]
- Xantusia gracilis Grismer & Galvan, 1986 [1]
- Xantusia henshawi Stejneger, 1893 [1]
- Xantusia jaycolei Bezy, Bezy & Bolles, 2008 [1]
- Xantusia riversiana Cope, 1883 [1]
- Xantusia riversiana reticulata Smith, 1946 [1]
- Xantusia riversiana riversiana Cope, 1883 [1]
- Xantusia sanchezi Bezy & Flores-villela, 1999 [1]
- Xantusia sherbrookei Bezy, Bezy & Bolles, 2008 [1]
- Xantusia sierrae Bezy, 1967 [1]
- Xantusia vigilis Baird, 1859 [1]
- Xantusia wigginsi Savage, 1952 [1]
Reptilia → Squamata → Scincomorpha → Xantusiidae
Porodica Xantusiidae uredi
- †Catactegenys Nydam et al. 2013 [2]
- Cricosaurinae [3]
- †Palaeoxantusia Hecht 1956 [2]
- †Palepidophyma Smith and Gauthier 2013 [2]
- †Paracontogenys Schatzinger 1977 [2]
- Xantusiinae [3]
Reptilia → Squamata → Scincomorpha
Xe uredi
- Xenagama
- Xenelaphis
- Xenocalamus
- Xenochrophis
- Xenodermatidae
- Xenodermus
- Xenodon
- Xenopeltidae
- Xenopeltis
- Xenophidiidae
- Xenophidion
- Xenopholis
- Xenosauridae
- Xenosaurus
- Xenotyphlopidae
- Xenotyphlops
- Xenoxybelis
Xi uredi
†Xilousuchus Wu, 1981 uredi
- †Xilousuchus sapingensis Wu, 1981
Animalia → Chordata → Reptilia → Pseudosuchia → Ctenosauriscidae
Xy uredi
- Xyelodontophis
- Xylophis