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Epeorus longimanus (Slate Brown Dun) Mayfly Nymph Pictures

This mayfly was collected from Mystery Creek #249 on July 4th, 2020 and added to Troutnut.com on July 12th, 2020.

Although difficult to tell in this picture, the gills on the first abdominal segment do meet ventrally in this specimen, a key characteristic for identification.  Epeorus longimanus (Slate Brown Dun) Mayfly Nymph from Mystery Creek #249 in Washington
Although difficult to tell in this picture, the gills on the first abdominal segment do meet ventrally in this specimen, a key characteristic for identification.
Here the meeting and slight overlap on the first pair of gills is more evident.  Epeorus longimanus (Slate Brown Dun) Mayfly Nymph from Mystery Creek #249 in Washington
Here the meeting and slight overlap on the first pair of gills is more evident.

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