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Saw-shelled turtle
The saw-shelled turtle, ''Myuchelys latisternum'', is a species of turtle in the Chelidae family endemic to Australia, ranging along rivers and streams and connected swamps and lagoons from coastal Cape York Peninsula to northern New South Wales, with populations also noted as far south as Newcastle - (Williams River Catchment site of the former Tilligra Dam). They are thought to have been introduced to Lake Eacham in the Atherton Tablelands. Other common English names are: serrated snapping turtle or common sawshell turtle.〔Ryan, Michelle, General Editor. (2000). ''Wildlife of Tropical North Queensland: Cooktown to Mackay''. Queensland Museum. ISBN 0-7242-9349-3.〕〔Ehmann, Harold (1992). ''Encyclopedia of Australian Animals: Reptiles''. Angus&Robertson. ISBN 0-207-17379-6 (Reptiles)〕
==Description==
The female is considerably larger than the male, with a carapace up to 28 cm long compared to the males which rarely get longer than about 18 cm. The carapace is roughly oval and broad at the rear.〔〔 They are not usually aggressive, but can bite fiercely. They can also emit a strong smell.〔
The shell has marginal serrations which are the reason for its common name. It retains some of these serrations throughout its life. "The head shield extends down the side of the head to just above the tympanum, and the top of the neck has prominent pointed tubercules (many of these with an apical sensory pit)."〔
The carapace is mainly brown to dark brown, commonly with some dark blotches. The plastron (underside) is yellowish. The head is large with a projecting snout and a horny plate on the top. The neck can fold sideways. The feet are webbed and also clawed. Hatchlings have serrated hind legs which become smooth as they mature.〔(Elseya latisternum )〕
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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