Aquatic Invertebrates
Media
![Photo of several prosobranch pond snails crawling on a rock.](/sites/default/files/styles/media_library/public/mo_nature/media/images/2015/08/gilled_pond_snails_clifty_creek_8-11-15.jpg?itok=4SWk6f5b)
Species Types
Scientific Name
Over 20 Missouri species in former subclass Prosobranchia
Description
Gilled snails are one of two main groups of aquatic snails in Missouri (the other group is the "lunged" snails). Gilled snails, or prosobranchs, breathe with gills and possess a hard trapdoor-like operculum. They are most common in the Ozarks.
See Also
About Aquatic Invertebrates in Missouri
Missouri's streams, lakes, and other aquatic habitats hold thousands of kinds of invertebrates — worms, freshwater mussels, snails, crayfish, insects, and other animals without backbones. These creatures are vital links in the aquatic food chain, and their presence and numbers tell us a lot about water quality.