Content tagged with "aquatic"

Image of a belted crayfish

Belted Crayfish

Orconectes harrisoni
This medium-small, tan crayfish — found only in the Big River and its tributaries — has a distinctive pattern of alternating olive-green and reddish-brown bands on the abdominal segments.

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Image of a big creek crayfish

Big Creek Crayfish

Orconectes peruncus
This moderately small, brown crayfish has a very localized distribution centered in Big Creek and its tributaries, in the St. Francis River basin. It lacks bright colors, but blackish specks and blotches occur over the top surfaces of the body and pincers.

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Image of a devil crayfish

Devil Crayfish

Cambarus diogenes
This powerfully built crayfish is usually a uniform olive or tan, without obvious blotches or spots. Occasional individuals are blue, with yellowish stripes on the abdomen and bright red outlining many body parts. It is found throughout much of the eastern United States.

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Photo of ditch fencing crayfish

Ditch Fencing Crayfish (Shield Crayfish)

Faxonella clypeata
This small, tan crayfish has a pattern of paired blackish dashes along the surface of the carapace and abdomen. The pincers are narrow and cylindrical, with short, abruptly tapering fingers. Sometimes called the shield crayfish, in our state, it's found only only in the southeast, from Ripley County to southern Bollinger County.

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Image of a freckled crayfish

Freckled Crayfish

Cambarus maculatus
Largely restricted to the Courtois Hills section of the Meramec River basin, this powerfully built, yellowish-tan crayfish has numerous conspicuous black spots on its pincers, carapace and abdomen.

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Photo of a gilled aquatic snail

Gilled Aquatic Snails (Prosobranch Pond Snails)

Over 20 Missouri species in former subclass Prosobranchia
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.

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Image of a golden crayfish

Golden Crayfish

Orconectes luteus
This wide-ranging species is quite variable in color, but it is typically olive-green suffused with golden yellow. The antennae and many body parts are trimmed with bright red. A dark band crosses the head just in front of the cervical groove, and another crosses the carapace at its junction with the abdomen.

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Image of a gray-speckled crayfish

Gray-Speckled Crayfish

Orconectes palmeri
This crayfish is gray with numerous greenish-black speckles and blotches on the pincers, carapace and abdomen. A pair of large blotches are present near the back of the head, and another pair occur near the junction of the carapace and abdomen. In our state, it is found only in the southeastern section.

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Image of hubbs' crayfish

Hubbs' Crayfish

Cambarus hubbsi
This powerfully built crayfish is usually olive-tan or reddish brown, without prominent spots or blotches. A narrow blackish band is present at the junction of the carapace and abdomen. In our state, it is limited to the Ozarks of southern Missouri.

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Photo of pulmonate snail crawling on rock

Lunged Aquatic Snail (Pulmonate Pond Snail)

Unliked gilled aquatic snails, lunged aquatic snails breathe via a lunglike pulmonary cavity. They also lack an operculum, the hard horny “trapdoor” that closes when the animal retracts into the shell.

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