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Missouri Department of Conservation
MDC Discover Nature
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1 1/2 to 2 inches
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Big rivers (Missouri and Mississippi)
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1 1/2 to 2 inches
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Bluefer (Purpleshell)
Potamilus purpuratus
Bryozoans (Moss Animals)
Freshwater species in the phylum Bryozoa
Deertoe
Truncilla truncata
Elktoe
Alasmidonta marginata
Fragile Papershell
Leptodea fragilis
Freshwater Mussels
Bivalve molluscs in order Unionoida
Giant Floater
Pygandon grandis
Hydras
Various species in the genus Hydra
Lilliput
Toxolasma parvus
Mapleleaf
Quadrula quadrula
Mucket
Actinonaias ligamentina
Paper Pondshell (Paper Floater)
Utterbackia imbecillis
Pimpleback
Quadrula pustulosa
Pink Heelsplitter
Potamilus alatus
Pink Mucket
Lampsilis abrupta
Endangered
Pink Papershell
Potamilus ohiensis
Pistolgrip (Buckhorn)
Tritogonia verrucosa
Plain Pocketbook
Lampsilis cardium
Threehorn Wartyback
Obliquaria reflexa
Threeridge
Amblema plicata
Turbellarians (Planarians; Free-Living Flatworms)
Species in genera Dugesia, Planaria, etc.
Wabash Pigtoe
Fusconaia flava
White Heelsplitter
Lasmigona complanata
Yellow Sandshell
Lampsilis teres
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