Keywords: FMIB 38258 Ohio River pig-toe, Quadrula obliqua (Lamarck), from Ohio River Upper Pair; Pig-toe, Quadrula undata (Barnes) from Illinois.jpeg check categories 26 August 2015 2 Ohio River pig-toe Quadrula obliqua Lamarck from Ohio River Upper Pair; Pig-toe Quadrula undata Barnes from Illinois River Lower Pair Subject Quadrula 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 VIII Creator Robert Ervin Coker PD-UWASH-FMIB Institution University of Washington FMIB-source accession number 38258 Images from the Freshwater and Marine Image Bank to check Robert Ervin Coker Shellfish |