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Alderfly Larvae
Sialis spp.
Bryozoans (Moss Animals)
Freshwater species in the phylum Bryozoa
Caddisfly Larvae
Various species in the order Trichoptera
Crayfishes
About 36 species in Missouri
Deertoe
Truncilla truncata
Fatmucket
Lampsilis siliquoidea
Fishfly Larvae
Chauliodes, Neohermes, and Nigronia spp. (in eastern US)
Freshwater Mussels
Bivalve molluscs in order Unionoida
Giant Floater
Pygandon grandis
Gilled Aquatic Snails (Prosobranch Pond Snails)
Over 20 Missouri species in former subclass Prosobranchia
Hydras
Various species in the genus Hydra
Leeches
Various species in the subclass Hirudinea
Lunged Aquatic Snails (Pulmonate Pond Snails)
Over 30 Missouri species in former subclass Pulmonata
Pimpleback
Quadrula pustulosa
Pink Mucket
Lampsilis abrupta
Endangered
Purple Wartyback (Purple Pimpleback)
Cyclonaias tuberculata
Ramshorn Snails
Gyraulus, Helisoma, Menetus, Micromenetus, Planorbula spp.
Round Pigtoe
Pleurobema sintoxia
Scuds and Sideswimmers (Amphipods)
Species in the crustacean order Amphipoda
Tubificid Worms (Tubifex Worms)
Tubifex spp. and other aquatic tubificid annelids
Turbellarians (Planarians; Free-Living Flatworms)
Species in genera Dugesia, Planaria, etc.
Wabash Pigtoe
Fusconaia flava
Water Scavenger Beetles
Beetles in the family Hydrophilidae
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Soft-bodied aquatic invertebrates without shells (6)
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Big rivers (Missouri and Mississippi) (19)
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Clear, rocky rivers, streams and springs (22)
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Lowland swamps, ditches and sloughs (15)
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