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Mississippi National River and Recreation Area
Fatmucket
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(Lampsilis siliquoidea) Barnes, 1823
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K.S. Cummings, Illinois Natural History Survey |
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Lake Pepin mucket; Grass mucket; Pugnose mucket.
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Lakes and small to medium-sized streams in mud, sand, or gravel.
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Up to 5 inches (12.7 cm).
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Yellow or brown shell, darker as adult, usually with green rays.
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White or bluish white with iridescent coloring on the widest end of the shell.
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Shell outline is longer than wide. The shell edge that is directly opposite the beak (located slightly above the point where the 2 shell halves join) is usually straight. The end of the shell farthest from the beak comes to a slightly rounded point in males, but looks cut off in females. In both males and females, this end is the widest point of the shell. It is more wide in females than in males.
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The outer shell looks very swollen or bulged out, especially in females (swollen mostly towards the widest end of the shell).
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Moderately elongate and very inflated, especially female. Female generally more postbasally inflated and rounded. Postbasal mantle margin broad, especially female, variably pigmented and papillose(outer surface often minutely papillose). Female has mantle flap, atypical of Lampsilis. Heterogenous marsupium.
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Bluegill, Largemouth Bass, Yellow Perch, Walleye, Black Crappie
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Widespread and common throughout the Midwest.
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Did You Know?
At Lake Onalaska, near LaCrosse Wisconsin, the Mississippi River is about 4 miles wide. Mississippi River water held behind Lock and Dam #7 and water held by damming the Black River form this broad reach of the Mississippi River.
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Last Updated: September 20, 2006 at 12:28 EST |