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''Cyclemys'' is a genus of freshwater turtles, commonly referred to as Asian leaf turtles, from the family Geoemydidae. The genus occurs throughout Southeast and South Asia, and currently contains seven species. Asian leaf turtles average in length. They are mostly brown to greenish in color, with round to rectangular shells. Their carapaces bear a superficial resemblance to plant leaves, hence their common name. They can be found around shallow, slow-moving bodies of water in hilly forests. Adults are primarily terrestrial, though juveniles are more aquatic. ==Taxonomy and nomenclature== ''Cyclemys'' turtles belong to the family Geoemydidae under the subfamily Geoemydinae. They were first described in 1834 by English zoologist Thomas Bell in his work ''A Monograph of the Testudinata''. ''Cyclemys'' and closely related genera (''Cuora'', ''Pyxidea'', and ''Notochelys'') are believed to have diverged from a common ''Heosemys''-like ancestor.〔 ''Cyclemys'' taxonomy and phylogeny have been historically difficult to ascertain due to the morphological similarity between species, as well as changes in the color patterns during growth. Until recently, the genus was thought to comprise only one or two morphologically variable species, ''C. dentata'' and ''C. oldhamii''.〔〔Asian Turtle Trade Working Group 2000. ''(Cyclemys dentata )''. In: IUCN 2010. (IUCN Red List of Threatened Species ). Version 2010.4. Retrieved March 25, 2011.〕 Subsequent investigation has now put the number of species under the genus to seven, though this remains controversial. The status of ''C. enigmatica'' as a valid species is contested, as is the recognition of ''C. atripons'' and ''C. pulchristiata'', both of which are nearly impossible to tell apart morphologically.〔 Previously recognized species, ''C. tcheponensis'' ( = ''C. tiannanensis'') and ''C. shanensis'', have been merged into ''C. oldhamii'' following mtDNA sequencing. The conclusions of which showed that the morphological differences between them (the presence or absence of neck/head stripes, and hatchling color patterns) were not enough to classify them as separate species.〔 ''C. ovata'' has been similarly subsumed into ''C. dentata''.〔 The two distinct morphological differences between ''Cyclemys'' species are based on the main color of their plastrons - species with yellow bellies (''C. atripons'', ''C. dentata'', and ''C. pulchristiata''), and species with dark bellies (''C. enigmatica'', ''C. fusca'', ''C. gemeli'', and ''C. oldhamii'').〔 Synonyms of ''Cyclemys'' (''ex errore'') include: ''Cyclemus'' Li, ''Cyclemis'' Good, and ''Cyclemy'' Mao.〔 The generic name ''Cyclemys'' comes from Greek κύκλος (meaning 'round' or 'circle', referring to the shape of the carapace) and εμύς ('freshwater turtle'). They are known under the common name Asian leaf turtles or simply leaf turtles, again because of the appearance of their carapaces. They share the collective name 'leaf turtles' with turtles of the genus ''Geoemyda'', as well as turtles with 'leaf' in their names, such as the Annam leaf turtle (''Mauremys annamensis''), among others.〔〔 'Asian leaf turtle' is also the specific common name of ''C. dentata''. 抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』 ■ウィキペディアで「Cyclemys」の詳細全文を読む スポンサード リンク
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