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''Siebenrockiella crassicollis'' (commonly known as black marsh turtle, smiling terrapin, and Siamese temple turtle, among others) is a freshwater turtle endemic to Southeast Asia. One of the two species classified under the genus ''Siebenrockiella'' in the Geoemydidae family. Black marsh turtles are small to medium-sized turtles that are almost completely black except for white to yellow markings on the head. They are largely aquatic and prefer slow-moving or still bodies of water with heavy vegetation. Black marsh turtles are also commonly kept as pets and as sacred animals in Southeast Asian Buddhist temples. They are classified as Vulnerable by the IUCN, being one of the several Southeast Asian turtle species heavily exploited for the international wildlife trade, particularly for food and traditional medicine in the Chinese markets. ==Taxonomy and nomenclature== Formerly under the genus ''Emys'', black marsh turtles are now classified under ''Siebenrockiella''. They were first described by the British zoologist John Edward Gray from three specimens from the collections of Thomas Bell. Black marsh turtles used to be monotypic within the genus ''Siebenrockiella'' until Diesmos et al. (2005) showed based on genetic studies and morphology, that the recently rediscovered and critically endangered Philippine forest turtles, until that time known as ''Heosemys leytensis'', were actually very closely related. Philippine forest turtles were subsequently reassigned to ''Siebenrockiella'' under the subgenus ''Panyaenemys''.〔 * * *Bickham, J.W., Parham, J.F., Philippen, H., Rhodin, A.G., Shaffer, H.B., Spinks, P.Q. & Van Dijk, P.P. (2007).("Turtle taxonomy: Methodology, recommendations, and guidelines" ). In: Shaffer, H.B., FitzsSimmons, N.N., Georges, A., & Rhodin, A.G. (Eds.), "Proceedings of a workshop on genetics, ethics, and taxonomy of freshwater turtles and tortoises", ''Chelonian Research Monographs'' 4:73–84 . Retrieved 1 April 2011〕 They are classified under the subfamily Geoemydinae under the family Geoemydidae. Black marsh turtles are cryptodires, having the ability to pull their heads straight back into the shells; instead of folding their necks sideways along the body like in pleurodiran turtles. The specific epithet "''crassicollis''" comes from Latin ''crassus'' ("thick") and ''collum'' ("neck"). The generic name was coined in honor of the Austrian zoologist Friedrich Siebenrock. ''Siebenrockiella crassicollis'' are known by a variety of vernacular names among hobbyists, such as black terrapin, black mud turtle, Malaysian black mud turtle, fat-headed turtle, thick-necked turtle, and Borneo black leaf turtle. They are also known as ''Dickhalsschildkröte'' in German, ホオジロクロガメ in Japanese, ''Kura-kura pipi-putih'' in Indonesian, and Черепаха черная болотная in Russian. 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「Black marsh turtle」の詳細全文を読む スポンサード リンク
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