World List of Marine, Freshwater
and Terrestrial Isopod Crustaceans
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Armadillidium nasatum is a common terrestrial isopod in North America which immigrated from Europe along with humans, and is found in many states. It inhabits greenhouses as well as backyards, grasslands, and sunny slopes. Normally the color is slate gray, but this specimen has a purplish hue caused by a virus. Like all terrestrial isopods, it feeds mostly on plant matter and can be a scavenger too. Terrestrial isopods in general are called by these common names: "sowbug," "pillbug," "roly-poly" or "potato bug."
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See also the Photo Gallery of Terrestrial Isopods
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