Neoephemeridae is a family of large squaregill mayflies in the order Ephemeroptera. There are at least four genera and about 17 described species in Neoephemeridae.
Genera These four genera belong to the family Neoephemeridae: Leucorhoenanthus Lestage, 1930 Neoephemera McDunnough, 1925 (large squaregill mayflies) Ochernova Bae & McCafferty, 1998 Potamanthellus Lestage, 1930
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