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Illinois Natural History Survey
Species Count: 135
Arionidae
Bulimulidae
Carychiidae
Cochlicopidae
Discidae
Haplotrematidae
Helicarionidae
Helicinidae
Helicodiscidae
Limacidae
Philomycidae
Polygyridae
Pomatiopsidae
Punctidae
Pupillidae
Strobilopsidae
Succineidae
Valloniidae
Zonitidae