Larvae aquatic, distinctive, cling to rocks and found more often than adults:
worldwide, most diverse in E. Asia; Eubrianacinae (represented in our area by Eubrianax) are circumpacific, Psepheninae (represented in our area by Psephenus) are primarily a New World group, and Eubriinae (the rest of our genera) are globally distributed(1)
Larvae on the underside of rocks of submerged wood in fast-flowing water. Adults on rocks and vegetation along streams.
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