Keywords: FMIB 38252 Quadrula ebenus (Lea) from Mississippi River Upper and Middle; Hickory-nut, Obovaria elipis (Lea) from Mississippi River Lower.jpeg Quadrula ebenus Lea from Mississippi River Upper and Middle; Hickory-nut Obovaria elipis Lea from Mississippi River Lower Pair Subject Quadrula Obovaria Freshwater mussels Tag Shellfish 1921 Cite book Fresh-water Mussels and Mussel Industries of the United States Coker Robert E Washington DC Government Printing Office 1921 Bulletin of the United States Bureau of Fisheries vol 36 1917-1918 Plate III Creator Robert Ervin Coker PD-UWASH-FMIB Institution University of Washington FMIB-source accession number 38252 Images from the Freshwater and Marine Image Bank to check Robert Ervin Coker Quadrula ebenus Obovaria elipis Shellfish |