Field Guide

Aquatic Invertebrates

Showing 1 - 10 of 40 results
Media
Photo of an aquatic isopod in an aquarium, crawling on a rock.
Species Types
Scientific Name
Freshwater members of the crustacean order Isopoda
Description
Everyone knows about terrestrial sowbugs and pillbugs, but many isopod species are aquatic. Missouri has several isopods that live in streams, ponds, rivers, and caves.
Media
brokenray
Species Types
Scientific Name
Lampsilis reeveiana
Description
The Arkansas brokenray only occurs in streams that flow south off of the Salem and Springfield plateaus, so it is found only in about the southern quarter of Missouri.
Media
Two pairs of Asian clam shells, still hinged together, showing exterior and interior
Species Types
Scientific Name
Corbicula fluminea
Description
The Asian clam is a nonnative, invasive species that lives in a variety of aquatic habitats. It has thick shells with distinctly ridged, concentric rings and a yellowish-brown to dark brown shell covering.
Media
butterfly
Species Types
Scientific Name
Ellipsaria lineolata
Description
The butterfly is one of the most beautiful of Missouri’s mussels.
Media
deertoe
Species Types
Scientific Name
Truncilla truncata
Description
A common mussel in some areas, deertoe have decorative green markings.
Media
Photograph of Ebonyshell freshwater mussel shell exterior view
Species Types
Scientific Name
Fusconaia ebena
Description
At one time the most valuable shell to the commercial button industry, the ebonyshell is now classified as Endangered in Missouri and is a candidate for federal Endangered status.
Media
elephantear mussel half-buried in a gravel substrate
Species Types
Scientific Name
Elliptio crassidens
Description
Today found only in the Meramec River, the elephantear has been classified as Endangered in Missouri and is a candidate for federal Endangered status.
Media
ellipse
Species Types
Scientific Name
Venustaconcha ellipsiformis and V. pleasii
Description
These small mussels use darters, a type of fish, as hosts for their young.
Media
fatmucket
Species Types
Scientific Name
Lampsilis siliquoidea
Description
The fatmucket was a favorite species harvested for the button industry in the early 1900s.
Media
Fingernail clam in a person’s hand
Species Types
Scientific Name
Pisidium, Sphaerium, and Musculium spp.
Description
Fingernail clams, also called pill clams or pea clams, are members of a family of small to tiny freshwater clams that are common but rarely noticed. They occur in a variety of aquatic habitats.
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.