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全名 Tridacna maxima (Roding, 1798) 英文俗名 Great Clam, Rugose Giant Clam, Small Giant Clam. 外殼特徵 Shell reaching 36cm in length; elongate- toshort-obtuse-triangular in shape, moderately to stronglyinflated and having a large byssal orifice. Valves heavy,thick, colour usually greyish white but often tinged withyellow or pinkish orange. Primary radial sculptureconsisting of from 6 to 12 broads, moderately convexrib-like folds becoming crowded and obsolete on ventralslope. Usually 6 ro 7 of these folds are very strong.Concentric sculpture consisting of low scales on primaryfolds. 地理分布 East Africa to eastern Polynesia except Hawaii. Lives inshallow water on reefs, partially imbedded in coral. 模式產地 The island of Mauritius is designated as the type localityfor T. maxima. 原始記錄 同種異名 Tridachnes maxima Roding, 1798Tridachnes noae Roding, 1798Tridachnes imbricata Roding, 1798Tridacna elongata Lamarck, 1819Tridacna rudis Reeve, 1862Tridacna acuticostata Sowerby, 1912Tridacna troughtoni Iredale, 1927 備註 This species was listed in the CITES Appendix II on 1stAugust 1985. The photo-specimen was collected from thesouth tip of Taiwan and was inventory in the MalacologyLab., Institute of Zoology, Academia Sinica, Taipei,Taiwan。