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全名 Plethobasus cicatricosus Say, 1829 英文俗名 White Wartyback Pearly Mussel, White WartybackMussel. 外殼特徵 Shell subtriangular or subquadrate, somewhat inflated, solidineqilateral; beaks very high, posterior ridge low, narrowlyrounded, ending in a blunt point at or below the median line.Surface generally sculptured with low, uneven, concentricridges; epidermis tawny to brown. Left valve with tworather small, triangular pseudocardinals and two laterals;right valve with one to three pseudocardinals and a doublelateral. Nacre white, thicker in front. 地理分布 Ohio River, Tennessee; Claiborne Co., Alabama, USA. 模式產地 Wabash River, Indiana, USA. 原始記錄 Unio cicatricosus Say, N. Harm. Diss., II, No.19,1829, p.292.－Chenu, Ill. Conch., 1858, pl. XI, figs.6. 同種異名 Unio cicatricosus Say, 1829Unio varicosus Lea, 1829Margarita (Unio) varicosus Lea, 1836Margaron (Unio) varicosus Lea, 1852Unio cicatricosus var. varicosus Paetel, 1890Pleurobema cicatricosa Simpson, 1900Unio cicatricoides Frierson, 1911 備註 The species is listed as endangered species under Taiwan'sWildlife Conservation Law (WCL). This species was listedin the CITES Appendix I on 1st July 1975. Photo-specimenwas collected from Cumberland River, Mashville, DavidsonCo., Tennessee, USA and inventory in UMMZ 81933。