• Xantusia gracilis 

      Lovich, Robert E.; Grismer, L. Lee (Society for the Study of Amphibians and Reptiles, 2003)
    • Xantusia henshawi 

      Lee, Julian C. (Society for the Study of Amphibians and Reptiles, 1976)
    • Xantusia vigilis 

      Bezy, Robert L. (Society for the Study of Amphibians and Reptiles, 1982)
    • Xenosaurus 

      Ballinger, Royce E.; Smith, Geoffrey R.; Lemos-Espinal, Julio A. (Society for the Study of Amphibians and Reptiles, 2000)
    • Xenosaurus grandis 

      Ballinger, Royce E.; Lemos-Espinal, Julio A.; Smith, Geoffrey R. (Society for the Study of Amphibians and Reptiles, 2000)
    • Xenosaurus newmanorum 

      Lemos-Espinal, Julio A.; Ballinger, Royce E.; Smith, Geoffrey R. (Society for the Study of Amphibians and Reptiles, 2000)
    • Xenosaurus platyceps 

      Smith, Geoffrey R.; Lemos-Espinal, Julio A.; Ballinger, Royce E. (Society for the Study of Amphibians and Reptiles, 2000)
    • Xenosaurus rectocollaris 

      Lemos-Espinal, Julio A.; Smith, Geoffrey R.; Ballinger, Royce E. (Society for the Study of Amphibians and Reptiles, 2000)
    • Zirconium Diboride/Copper EDM Electrodes From Selective Laser Sintering 

      Stucker, Brent; Bradley, Walter; Eubank, P.T.; Norasetthekul, Somchintana; Bozkurt, Bedri (1997)