The Superfamily Ephemeroidea is further organized into finer groupings including:
Ephemeridae is a family of mayflies with about 150 described species found throughout the world except Australia and Oceania. These are generally quite large mayflies (up to 35 mm) with either two or three very long tails. Many species have distinctively patterned wings. [more]
At least 22 species and subspecies belong to the Family Polymitarcyidae.
More info about the Family Polymitarcyidae may be found here.
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