Keywords: FMIB 38267 Pimple-back, Quadrula pustulosa (Lea), from Mississippi River, illustrating diversity of this species in form and sculpture.jpeg Pimple-back Quadrula pustulosa Lea from Mississippi River illustrating diversity of this species in form and sculpture 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 V Creator Robert Ervin Coker PD-UWASH-FMIB Institution University of Washington FMIB-source accession number 38267 Images from the Freshwater and Marine Image Bank to check Robert Ervin Coker Quadrula pustulosa Shellfish |