Field Guide

Aquatic Invertebrates

Showing 1 - 10 of 13 results
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
Photo of a coldwater crayfish.
Species Types
Scientific Name
Faxonius eupunctus (formerly Orconectes eupunctus)
Description
The coldwater crayfish has a very localized distribution in the Eleven Point River system. It is stout, with a blue-green head and pincers and dark, rust-brown carapace. It is an imperiled species.
Media
Photo of a devil crayfish.
Species Types
Scientific Name
Lacunicambarus aff. diogenes (syn. Cambarus diogenes)
Description
The powerfully built devil crayfish is usually a uniform olive or tan, without obvious blotches or spots. It digs underground burrows, often with mud chimneys, and has a wide distribution.
Media
elktoe
Species Types
Scientific Name
Alasmidonta marginata
Description
The elktoe is one of many Missouri mussels with a declining population.
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
fragile papershell
Species Types
Scientific Name
Leptodea fragilis
Description
A widespread mussel that relies on freshwater drum as host fish for the developing young.
Media
pond mussel
Species Types
Scientific Name
Bivalve molluscs in order Unionoida
Description
Secretive and seldom seen, freshwater mussels are extraordinarily diverse in Missouri. We have nearly 70 species within our borders. Many are declining, and several are endangered.
Media
lilliput
Species Types
Scientific Name
Toxolasma parvus
Description
These diminutive mollusks are the smallest of Missouri’s freshwater mussels.
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.