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Class Reptilia (Reptiles)

Tuatara (Sphenodon)
Tuatara (Sphenodon)
Source: Microsoft® Encarta® 96 Encyclopedia


Please do not plagiarize. If you would like to use this information in a print or electronic publication, please ask me for permission first and cite this page as:
Knapp, Robbin D. 1997. "Class Reptilia (Reptiles)". In Robb's Online Multimedia Database of Animals and Plants. Oct. 19, 1997.

Some Orders of the Class Reptilia (Reptiles)

23 in all
  1. Ichthyosauria extinct: "fish lizards", large marine reptiles that had fishlike bodies and paddlelike limbs
  2. Sauropterygia extinct: "lizard-winged", long-necked aquatic reptiles that had paddle-shaped limbs adapted for moving through water
  3. Saurischia extinct: "lizard-hipped" dinosaurs
  4. Ornithiscia extinct: "bird-hipped" dinosaurs
  5. Pterosauria extinct: "winged lizards", flying reptiles related to dinosaurs
  6. Therapsida extinct: advanced mammal-like reptiles
  7. Squamata: the largest order of living reptiles, containing more than 5000 species of lizards and snakes, sometimes considered a subclass
    • Lacertilia: lizards (2500 species)
    • Serpentes: snakes (about 2500 species)
  8. Chelonia (Testudines, Testudinata): already differentiated from other reptiles in the Triassic period, today comprising the turtles and tortoises (nearly 250 species), sometimes considered the subclass Testudinata
    Suborders (sometimes considered orders):
    • Amphichelydia: extinct
    • Cryptodira: pull their heads into the shell in an s-shaped curve of the neck
    • Pleurodira: side-necked turtles, freshwater species that hide their heads by bending the neck sideways
  9. Crocodilia (Crocodilians): first evolved in the late Triassic period, the closest living relatives of dinosaurs and birds, the crocodiles, alligators, caimans and gavials (22 species)
  10. Rhynchocephalia (beakheads): lizardlike reptiles which are differentiated from the lizards by osteological characteristics (differences in the bones) (2 species)

King Philip Chews on funny ginger snaps.

  • Aichele, Schwegler, Zahradnik & Cihar. 1985. Goldener Kosmos-Tier- und Pflanzenführer. Frankh: Stuttgart. 779 pp.
  • Blum, Joachim. 1978. Die Reptilien and Amphibien Europas. Hallwag: Bern. 64 pp.
  • Fisher, G. Clyde (Ed.). 1927. The One Volume Nature Encyclopedia. W W Norton: New York. 940 pp.
  • Microsoft Corporation. 1996. Microsoft® Encarta® 96 Encyclopedia.
  • Wilson, Pamala. 1994. "Sea Turtle". Sea World.

Kingdoms | Phyla | Classes

Last updated October 19, 1997, by
Robbin D. Knapp robb@robbsbooks.com
Copyright © 1997 Robbin D. Knapp.