A genus of tiny biting flies that are characterized by having fringed or feathered antennae and are known to inhabit fast-flowing waters.
From Greek 'blepharon' (eyelid or lash) + 'kera' (horn or antenna). The genus name refers to the distinctive antennae that resemble eyelashes, named this way because early naturalists observed the fine, hair-like structures when viewing specimens under early microscopes.
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