Sphaerius is a genus of beetle, comprising 23 species, which are the only members of the family Sphaeriusidae. They are typically found along the edges of streams and rivers, where they feed on algae, occurring on all continents except Antarctica. Only 3 species occur in the United States. The overall form of the beetle is convex, glossy, dark bro...
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http://en.wikipedia.org/wiki/Sphaerius
Sphaerius is a genus of beetle comprising the family Sphaeriidae, and containing 18 species worldwide. The antennae have a three-jointed club, and the wings are fringed with hair. One species,
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http://www.probertencyclopaedia.com/browse/BSB.HTM
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