''Anthopotamus verticis'', or Walker's tusked sprawler, is a species of hacklegilled burrower mayfly in the family

Potamanthidae Potamanthidae is a family of mayflies Mayflies (also known as shadflies or fishflies in Canada and the upper Midwestern United States, as Canadian soldiers in the American Great Lakes region, and as up-winged flies in the United Kingdom) a ...

. It is found in southeastern Canada and the northern and southeastern United States.

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