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全名 Villosa trabalis (Conrad, 1834)
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英文俗名 Cumberland Bean Pearly Mussel, Cumberland Bean.
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外殼特徵 Shell solid, inflated, quite inequilateral, irregularly oval,with full, rather high beaks. Surface with irregular growthlines, dirty olive-green, with numerous faint, wavy rays. Leftvalve with two solid, triangular pseudocardinals and twolong straight, club-shaped laterals, right valve with threepseudocardinals, the central one solid and triangular, theothers small. Nacre white of bluish-white with bluish orgreenish iridescent behind, much thicker in front.
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地理分布 Kentucky and streams of Tennessee; Clinch River,Virginia, USA.
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模式產地 not given.
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原始記錄 Unio trabalis Conrad, New F. W. Shells, May 3,1834, p.27, pl. III, fig.5, p.72; Monog., XII, 1840, p.110,pl.LX, fig.2.
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同種異名 Unio trabalis Conrad, 1834Lampsilis trabalis Simpson, 1900Unio troostensis Lea, 1834Margarita (Unio) troostensis Lea, 1836Margaron (Unio) troostii Lea, 1870
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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. Micromya wasalso genus name. It was also named as Micromya trabalis.Photo-specimen was collected from the Cumberland River,Cumberland Falls, Whitley Co., Kentucky, USA andinventory in UMMZ 172778-1。
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