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Creatures
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Unionid Freshwater Mussels
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Ptychobranchus
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Kidneyshell
Ptychobranchus fasciolaris (Rafinesque 1820)
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Kidney-shell, Ptychobrancchus phaseolus; marsupium occupying entire lower border of outer gills and much folded. 1922. Freshwater mussels; Ptychobranchus.
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Freshwater and Marine Image Bank U Washington
Kidney-shell, Ptychobrancchus phaseolus; marsupium occupying entire lower border of outer gills and much folded.
Kidney-shell, Ptychobranchus phaseolus (Hildreth), from Obey River, Ky., upper pair; Rock pocketbook, Arcidens confragosus (Say), from Mississippi River, lower pair. 1921. Ptychobranchus; Arcidens; Freshwater mussels.
cc-publicdomain
Freshwater and Marine Image Bank U Washington
Kidney-shell, Ptychobranchus phaseolus (Hildreth), from Obey River, Ky., upper pair; Rock pocketbook, Arcidens confragosus (Say), from Mississippi River, lower pair.