Most reptiles are oviparous (egg-laying) animals with the exception of some ovoviviparous (live-bearing) constrictor snakes and vipers, as well as a few lizard species. Reptiles are animals that are ectothermic (cold-blooded) vertebrates that breathe air. Lizards belong in a large class of animals called Reptilia, which contains over 8225 species. Reptile Care: Keeping Reptiles and Amphibians as Pets For information on keeping lizards as pets, see: Each of these sections has a list of all types of lizards that may be found for pets, as well as many other species. There are currently about 27 lizard families, based on traditional classification, described as well. In this guide, the lizard classification section outlines the main taxonomic ranks, from the kingdom down to the lizard families. The groupings, and the principles behind the groupings, have significantly changed since their conception and continue to change and expand, as more information is being assimilated.
These ranks are kingdom, phylum, class, order, family, genus, and species. The Linnaean classification system has a hierarchy of seven main taxonomic ranks, defined by the international nomenclature codes. The system currently used by taxonomists is called the Linnaean taxonomic system, in his honor. Linnaeus is often called the 'Father of Taxonomy'. He is credited for the beginnings of this system as a way of arranging plants and animals into groups based on differences and similarities between them. This classification system was devised by Swedish biologist Carl Linnaeus in the late eighteenth century. Lizard classification is part of a natural classifying system used by taxonomists. Only Chameleon's have those crazy bulging eyes that swivel around in all directions, and those curious feet. The lizard in the picture above is easily recognized as a Chameleon. Most lizard families contain various groups of lizards tied together by anatomical similarities, Many common lizard species are often simply referred to as Agamas, Chameleons, Geckos, Iguanas, Monitors, Skinks, Tegus and a few others. Pet lizards and lizard species in general are often described by their family, or a common name descriptive of their family.
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