Polypedilum

Polypedilum is a genus of non-biting midges in the subfamily Chironominae of the bloodworm family Chironomidae. This is probably is the most species-rich of all chironomid genera. Larvae of Polypedilum may also be among the most abundant invertebrates in euthrophic ponds reaching densities of up to 1200 larvae per square meter. ...
Found on http://en.wikipedia.org/wiki/Polypedilum
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