• Opheodrys aestivus 

    Walley, Harlan D.; Plummer, Michael V. (Society for the Study of Amphibians and Reptiles, 2000)
  • Ophisaurus 

    Holman, J. Alan (Society for the Study of Amphibians and Reptiles, 1971)
  • Ophisaurus attenuatus 

    Holman, J. Alan (Society for the Study of Amphibians and Reptiles, 1971)
  • Ophisaurus ceroni 

    Holman, J. Alan (Society for the Study of Amphibians and Reptiles, 1971)
  • Ophisaurus compressus 

    Holman, J. Alan (Society for the Study of Amphibians and Reptiles, 1971)
  • Ophisaurus incomptus 

    Holman, J. Alan (Society for the Study of Amphibians and Reptiles, 1971)
  • Ophisaurus mimicus 

    Palmer, William M. (Society for the Study of Amphibians and Reptiles, 1991)
  • Ophisaurus ventralis 

    Holman, J. Alan (Society for the Study of Amphibians and Reptiles, 1971)
  • Oscaecilia ochrocephala 

    Nieto-Román, Sandra; Wake, Marvalee H. (Society for the Study of Amphibians and Reptiles, 2012)
  • Osteopilus vastus 

    Henderson, Robert W.; Henderson, Rose M. (Society for the Study of Amphibians and Reptiles, 2004)
  • Oxybelis aeneus 

    Keiser, Edmund D., Jr. (Society for the Study of Amphibians and Reptiles, 1982)
  • Paleosuchus 

    Magnusson, William E. (Society for the Study of Amphibians and Reptiles, 1992)
  • Paleosuchus palpebrosus 

    Magnusson, William E. (Society for the Study of Amphibians and Reptiles, 1992)
  • Paleosuchus trigonatus 

    Magnusson, William E. (Society for the Study of Amphibians and Reptiles, 1992)
  • Pelamis, P. platurus 

    Pickwell, George V.; Culotta, Wendy A. (Society for the Study of Amphibians and Reptiles, 1980)
  • Peltocephalus, P. dumerilianus 

    Iverson, John B.; Vogt, Richard C. (Society for the Study of Amphibians and Reptiles, 2002)
  • Peltophryne fluviatica 

    Powell, Robert; Pregill, Gregory K. (Society for the Study of Amphibians and Reptiles, 1991)
  • Peltophryne guentheri 

    Powell, Robert (Society for the Study of Amphibians and Reptiles, 1992)
  • Peltophryne lemur 

    Díaz-Lameiro, Alondra M.; Herrera, José Luis; Barber, Diane; Powell, Robert; Bird-Pico, Fernando (Society for the Study of Amphibians and Reptiles, 2010)
  • Petrosaurus 

    Jennings, Mark R. (Society for the Study of Amphibians and Reptiles, 1990)