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Ephemerella excrucians (Pale Morning Dun) Mayfly Nymph Pictures

Classification
Kingdom Animalia (Animals)
» Phylum Arthropoda (Arthropods)
» Class Insecta (Insects)
» Order Ephemeroptera (Mayflies)
» Family Ephemerellidae (Hendricksons, Sulphurs, PMDs, BWOs)
» Genus Ephemerella (Hendricksons, Sulphurs, PMDs)
» Species excrucians (Pale Morning Dun)
 I spent (Spent: The wing position of many aquatic insects when they fall on the water after mating. The wings of both sides lay flat on the water. The word may be used to describe insects with their wings in that position, as well as the position itself.) a while with a microscope to fairly positively identify this specimen as Ephemerella excrucians.

This mayfly was collected from the Upper Midwest on June 9th, 2005 and added to Troutnut.com on May 26th, 2006.

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CameraCanon EOS 20D
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This picture was taken through a low-powered microscope.
CameraCanon EOS 20D
View Full SizeView Full Size (2.7X larger)
AddEmail
CameraCanon EOS 20D
View Full SizeView Full Size (2.7X larger)
AddEmail
CameraCanon EOS 20D

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