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全名 Epioblasma walkeri (Wright, 1897) 英文俗名 Brown-blossom Pearly Mussel, Brown-blossom Naiad,Tan Riffleshell. 外殼特徵 Shell subrhomboid, rather short, solid, slightly inflated, witha high, angled posterior ridge; beaks full, moderately high,their sculpture not observed; posterior slope coverd withradiating, curved corrugations. Epidermis dark, apparentlyunicolored, but when viewed by transmitted light it is oftenclouded or spotted, sometimes having a few angular, darkspots, but never rayed. Left valve with two somewhatcompressed, but solid, pseudocardinals and two smalllaterals; right valve with one pseudocardinal and one lateral.Nacre reddish or greenish, iridescent behind, muchthickened in front. 地理分布 Suwanee River, Madison Co., Florida and OchlockneeRiver, Georgia, USA. 模式產地 Suwanee River, Madison Co., USA. 原始記錄 Unio walkeri B. H. Wright, Naut., XI, 1897, p.91. 同種異名 Unio walkeri B. H. Wright, 1897Medionidus walkeri Simpson, 1900 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. Dysnomia andPlagiola were genus names. It was named as Plagiolaflorentina. Photo-specimen was collected from Stone River,Waterhill, Rutherford Co., Tennessee, USA and inventoryin UMMZ 90729-1。