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Mississippi National River and Recreation Area
Wabash Pigtoe
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(Fusconaia flava) Rafinesque, 1820
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K.S. Cummings, Illinois Natural History Survey |
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Creeks to large rivers in mud, sand, or gravel.
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Red, yellow or brown, sometimes with rays.
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White or salmon, with some iridescent coloring on the longest end of the shell (measured from the point where the two shell halves meet.)
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The overall outline is round, but the edges are somewhat triangular(imagine a triangle blown up, like a balloon). The outline of the shell edge farthest from the beak (which is the swelling above where the two shells join) narrows to a short, blunt point.
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Feels like rough cloth. No bumps. The entire shell surface can either bulge out or look somewhat flattened. The face looks slightly pressed-in from the beak to the opposite shell edge (it looks similar to the pressed-in mark your thumbprint would make on wet clay).
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Shell red, yellow or brown, occasionally with rays. Subtriangular. Postbasal margin: pointed. Disc: sulcate. Ventral margin: concave. Posterior ridge: sharp. Postbasal mantle margin: simple (no specail structures). Marsupium: tetragenous (4-parted). Soft parts usually red,orange or white; especially musculature and gravid marsupium. Sexes alike.
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Bluegill, Silver Shiner, White Crappie, Black Crappie, Creek Chub
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![A flooded street in 1952 A flooded street in 1952](https://webarchive.library.unt.edu/eot2008/20090511154434im_/http://www.nps.gov/mwr/customcf/apps/CMS_HandF/Pictures/MISS_dyn_1952street.jpg) |
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Did You Know?
In 1952, the Mississippi River flooded hundreds of acres of farmland and multiple cities. Over 2,000 families were homeless because of the high water.
more...
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Last Updated: September 20, 2006 at 14:47 EST |