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Sphaeriidae (subclass Pterygota, order Coleoptera) Family of tiny beetles, less than 1 mm long, in which the body is very rounded and shining. The wings have reduced venation, and fringes of long hairs. The antennae are clubbed. Tarsi are three-segmented, the claws unequal. Sphaeriidae are found in wet areas. Larvae are aquatic, oval, and yellowish. There are 11 species, distributed world-wide.

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