Content tagged with "Aquatic Invertebrates"

Pink Mucket

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

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. More

Pistolgrip (Buckhorn)

Tritogonia verrucosa
Shaped like a checkered gunstock, with its unique, turned-down edge, pistolgrips are easy to identify. More

Plain Pocketbook (Pocketbook)

plain pocketbook
Lampsilis cardium
One of the most common and widespread mussels in our state, its oval shape, relatively large size and frequent occurrence make it one of the most easily recognized. More

Pond Mussel

pond mussel
Ligumia subrostrata
This widespread species is one of the few Missouri mussels successful in shallow ponds and lakes. More

Prairie Crayfish

Image of a prairie crayfish
Procambarus gracilis
This rather uniformly colored, bright red or reddish crayfish has broad, powerful pincers. As the name suggests, it inhabits grasslands from Wisconsin and Indiana down to Texas. In our state, it occurs in grasslands in the northern half and in the west. More

Predaceous Diving Beetles (Water Tigers)

Photo of a predaceous diving beetle
Species in the beetle family Dytiscidae
Like many aquatic insects, these large oval beetles prey voraciously on other aquatic organisms. Excellent swimmers, they fly well, too, and are often attracted to lights. More

Purple Wartyback (Purple Pimpleback)

Photograph of Purple Wartyback freshwater mussel shell exterior view
Cyclonaias tuberculata
Before buttons were made of plastic, they were made of shell. Because only white buttons were in demand, the coppery-purple shell of this species made it worthless for the button industry. More

Ramshorn Snails (Wheel Snails; Planorbids)

Gyraulus, Helisoma, Menetus, Micromenetus, Planorbula spp.
This group of freshwater snails is easy to identify at a glance, because the shell is a flat, disklike coil. Like other pulmonate snails, they lack an operculum (a hard horny “trapdoor” that other types of aquatic snails possess that closes when the animal retracts into the shell). More

Red Swamp Crayfish

Image of a red swamp crayfish
Procambarus clarkii
This crayfish is found in Missouri's Bootheel. Adults of this species are dark red (nearly black on the carapace) and have a wedge-shaped black stripe on the abdomen. Juveniles are a uniform gray, sometimes overlain by dark wavy lines. More