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翻訳と辞書　辞書検索 [ 開発暫定版 ] スポンサード リンク Southern giant clam ： ウィキペディア英語版 Southern giant clam The southern giant clam, ''Tridacna derasa'', is a species of extremely large marine clam in the cockle family, Cardiidae. ==Description== The southern giant clam is one of the largest of the "giant clams", reaching up to 60 cm in length.〔(CITES: Twenty-second Meeting of the Animals Committee ), Lima (Peru), 7–13 July 2006 (January 2007).〕 The species is also known as the smooth giant clam because of the relative lack of ribbing and scales on its thick shell. The smoothness of the southern giant clam's shell and its six to seven vertical folds help to distinguish it from its larger relative, ''Tridacna gigas'', which has four to five folds and a rougher texture. Lack of scutes (scale-like protrusions of the shell) that are present in most other ''Tridacna'' species is a defining characteristic of this species, although in aquacultures specimens have been observed to develop scutes in at least one abnormal case. The mantle usually has a pattern of wavy stripes or spots, and may be various mixtures of orange, yellow, black and white, often with brilliant blue or green lines.〔Lukan, E. M. (1999). (Critter Corner: ''Tridacna derasa'' ). Fish 'N' Chips: A Monthly Marine Newsletter, 1999.〕 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「Southern giant clam」の詳細全文を読む スポンサード リンク 翻訳と辞書 : 翻訳のためのインターネットリソース Copyright(C) kotoba.ne.jp 1997-2016. All Rights Reserved.