Content tagged with "Aquatic Invertebrates"

Photo of a Salem cave crayfish.

Salem Cave Crayfish

Cambarus hubrichti
The Salem cave crayfish has a special habitat: It lives in caves in the Missouri Ozarks. Its localized distribution makes its populations vulnerable to catastrophes that might pollute or damage their cave environment.

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Leptodea leptodon
Rarely seen, this Endangered freshwater mussel has a thin and delicate shell that is strikingly beautiful inside.

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Photo of an amphipod, or scud, on a rock.

Scuds and Sideswimmers (Amphipods)

Species in the crustacean order Amphipoda
Often overlooked by people, but eagerly sought by fish, Missouri’s amphipods could be described as “shrimplike sowbugs.” Scuds live in various aquatic habitats, and several species inhabit caves.

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Photograph of Sheepnose freshwater mussel shell exterior view

Sheepnose (Bullhead)

Plethobasus cyphyus
The sheepnose has been classified as Endangered in Missouri and is a candidate for federal Endangered status.

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Photo of a shield crayfish, also called a ditch fencing crayfish.

Shield Crayfish (Ditch Fencing Crayfish)

Faxonella clypeata
The shield crayfish is small and tan, with a pattern of paired blackish dashes along the surface of the carapace and abdomen. The pincers are narrow, with short, abruptly tapering fingers. In Missouri it's found only in our southeast counties.

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Photo of a shrimp crayfish.

Shrimp Crayfish

Orconectes lancifer
The shrimp crayfish is medium-small, light reddish brown to gray, and thickly dusted with darker specks. Its rostrum (“nose”) is unusually long, with the tip longer than the base, and the pincers are narrow and weak. It is found in the Bootheel.

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Photo of a Shufeldt’s dwarf crayfish.

Shufeldt’s Dwarf Crayfish (Swamp Dwarf Crayfish)

Cambarellus shufeldtii
Shufeldt’s dwarf crayfish is small, reddish brown to gray, with a paired series of dark, wavy stripes or dashes along the dorsal surface. In Missouri, it occurs in our southeastern lowlands and north along the Mississippi River floodplain.

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Epioblasma triquetra
The snuffbox has been classified as Endangered in Missouri and is a candidate for federal Endangered status. Perhaps it should also be a candidate for a new common name, since the popularity of snuff-taking is long past.

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Spectaclecase (Spectacle Case)

Cumberlandia monodonta
Missouri may have the largest number of spectaclecase mussels left in the world. These elongated shellfish can live for 60 years or more.

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Spike (Ladyfinger)

Elliptio dilatata
Nacre color varies from purple to pink to white. In smaller rivers, the shell is much thinner.

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