Based on the pale longitudinal forewing veins (excepting the costals), dark middle terga (Tergum: the dorsal part of an abdominal segment or segments (terga). Also used to describe the entire abdominal dorsum or the thoracic dorsal segments of Odonata.), and genitalia (Burks '53), this specimen is P. adoptiva.
This mayfly was collected from Factory Brook on May 9th, 2007 and added to Troutnut.com on May 18th, 2007.
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