Leptohyphidae 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) are aquatic insects belonging to the order ...
with some 140 described species in 12 genera.
References
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Mayflies
Insect families
{{Mayfly-stub