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Cyclorana
''Cyclorana'' is a genus of frogs in the family Hylidae (tree frogs), whose members are found in most of Australia. It was formerly considered a separate genus, but reclassified following a major revision by Frost et al. in 2006.〔Darrel R. Frost, Taran Grant, Julia´ N Faivovich, Raoul H. Bain, Alexander Haas, Ce´ Lio F.B. Haddad, Rafael O. De Sa´ , Alan Channing, Mark Wilkinson, Stephen C. Donnellan, Christopher J. Raxworthy, Jonathan A. Campbell, Boris L. Blotto, Paul Moler, Robert C. Drewes, Ronald A. Nussbaum, John D. Lynch, David M. Green, And Ward C. Wheeler, 2006, The Amphibian Tree of Life. ''Bulletin of the American Museum of Natural History'', 297: 362 ()
〕 Although classified as tree frogs, this genus is entirely terrestrial and lacks toe pads which their arboreal relatives use for climbing. They are classified as tree frogs because of their similarity with the other members of the genus ''Litoria'' in terms of skeletal structure and physical resemblance of the tadpoles.
This genus inhabits some of the most arid zones of Australia. Some species burrow underground and remain dormant for more than five years to survive drought conditions. They can store large amounts of water in their bladder, and form a "cocoon" around themselves to reduce loss of water. This is why they are often called "water-holding frogs". They only return to the surface to breed and eat, and normally only after heavy summer rains. Eggs are normally laid in temporary water, and tadpoles develop quickly to metamorphose before the water completely evaporates.
==Species==
抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』
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