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Content tagged with "Aquatic Invertebrates"

Photo of a Neosho midget crayfish.

Neosho Midget Crayfish

Orconectes macrus
The Neosho midget crayfish is a subdued mottled brown, with a prominent black band crossing the carapace near its junction with the abdomen. The pincers are broad and powerful. This small, stout crayfish is found in the Neosho stream drainage of southwestern Missouri and northwestern Arkansas.

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Photo of a northern, also called virile, crayfish.

Northern Crayfish (Virile Crayfish)

Oronectes virilis
The northern crayfish is large, reddish-brown or green, and without prominent markings. The pincers are green with orange tips and in adults are conspicuously studded with whitish knobs. Paired dark blotches run lengthwise along the abdomen. This species is widespread.

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Photo of an Ohio shrimp with small grayish pincers in the foreground.

Ohio Shrimp (Ohio River Shrimp)

Macrobrachium ohione
Of Missouri’s two species of freshwater shrimp, the Ohio River shrimp is certainly the rarest. It was thought to be extinct in our state but was rediscovered recently in the Mississippi River.

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Photo of an Ozark crayfish.

Ozark Crayfish

Orconectes ozarkae
The Ozark crayfish is light brown to reddish brown with numerous black specks on the pincers and often on the abdomen as well. The pincers are broad and powerful. It lives in the White and Black stream systems.

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paper pondshell

Paper Pondshell (Paper Floater)

Utterbackia imbecillis
Unlike most other freshwater mussels, this species is hermaphrodic: An individual mussel can be both male and female.

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Photo of a papershell crayfish, also called calico crayfish.

Papershell Crayfish (Calico Crayfish)

Orconectes immunis
The papershell crayfish is rather plain: gray-green with a pale central zone along the middle of the carapace and abdomen. The pincers are orange-tipped, and in mature males are tinged with purple. It is usually only found in the northern half of the state.

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pimpleback

Pimpleback

Quadrula pustulosa
While the pimpleback is usually bumpy, some individuals are perfectly smooth.

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pink heelsplitter

Pink Heelsplitter

Potamilus alatus
A large dorsal wing and purple lining make identification of this widespread mussel easy.

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pink mucket

Pink Mucket

Lampsilis abrupta
This endangered native mussel lives in flowing waters of large streams among gravel and cobble.

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pink papershell

Pink Papershell

Potamilus ohiensis
This species enjoys the same geographic distribution in our state as the pink heelsplitter, and it generally resembles that species, too. But as the name suggests, the pink papershell usually has a thinner shell and is smaller. Also, it prefers rather shallow water with a good current.

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