Elliptio crassidens (Lamarck, 1819)  

Family: Unionidae

elephant-ear

[Obliquaria venus Rafinesque, 1831, moreUnio crassidens Lamarck, 1819, Unio danielsii B.H. Wright, 1899, Unio incrassatus Lea, 1840, Unio nigra Rafinesque, 1820, Unio nigra fusca Rafinesque, 1820, Unio nigra maculata Rafinesque, 1820]