This mayfly was collected from the Ruby River on July 8th, 2019 and added to Troutnut.com on July 18th, 2019.
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Puzzled on this mayfly, not even confident on family 1 Reply »
This seems to be some sort of Heptageniid, based on the two tails and five segments on the hind tarsus. Following the key in Merritt & Cummins seems to lead to Rhithrogena, but it doesn't fit a characteristic described in Needham's Biology of Mayflies for that genus: "Tibia of hind leg in both sexes about 1/4 length of femur."Reply
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