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Lateral view of a Male Baetis (Baetidae) (Blue-Winged Olive) Mayfly Dun from Mystery Creek #43 in New York
Blue-winged Olives
Baetis

Tiny Baetis mayflies are perhaps the most commonly encountered and imitated by anglers on all American trout streams due to their great abundance, widespread distribution, and trout-friendly emergence habits.

Dorsal view of a Glossosoma (Glossosomatidae) (Little Brown Short-horned Sedge) Caddisfly Larva from the Yakima River in Washington
I caught this tiny larva without a case, but it seems to key pretty clearly to to Glossosomatidae. From there, the lack of sclerites on the mesonotum points to either Glossosoma or Anagapetus. Although it's difficult to see in a 2D image from the microscope, it's pretty clear in the live 3D view that the pronotum is only excised about 1/3 of its length to accommodate the forecoxa, not 2/3, which points to Glossosoma at Couplet 5 of the Key to Genera of Glossosomatidae Larvae.
27" brown trout, my largest ever. It was the sub-dominant fish in its pool. After this, I hooked the bigger one, but I couldn't land it.
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Male Cinygmula ramaleyi (Small Western Gordon Quill) Mayfly Dun Pictures

This dun hatched out from a nymph in my aquarium on July 16th, after being collected July 10th. It is probably of the same species as this nymph, and this dun which also hatched from one of these seemingly identical nymphs.

Male Cinygmula ramaleyi (Heptageniidae) (Small Western Gordon Quill) Mayfly Dun from Nome Creek in Alaska
Ventral view of a Male Cinygmula ramaleyi (Heptageniidae) (Small Western Gordon Quill) Mayfly Dun from Nome Creek in Alaska
Dorsal view of a Male Cinygmula ramaleyi (Heptageniidae) (Small Western Gordon Quill) Mayfly Dun from Nome Creek in Alaska
Lateral view of a Male Cinygmula ramaleyi (Heptageniidae) (Small Western Gordon Quill) Mayfly Dun from Nome Creek in Alaska
Male Cinygmula ramaleyi (Heptageniidae) (Small Western Gordon Quill) Mayfly Dun from Nome Creek in Alaska
Male Cinygmula ramaleyi (Heptageniidae) (Small Western Gordon Quill) Mayfly Dun from Nome Creek in Alaska
Male Cinygmula ramaleyi (Heptageniidae) (Small Western Gordon Quill) Mayfly Dun from Nome Creek in Alaska
Ruler view of a Male Cinygmula ramaleyi (Heptageniidae) (Small Western Gordon Quill) Mayfly Dun from Nome Creek in Alaska The smallest ruler marks are 1 mm.

This mayfly was collected from Nome Creek in Alaska on July 10th, 2011 and added to Troutnut.com by Troutnut on July 16th, 2011.


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Male Cinygmula ramaleyi (Small Western Gordon Quill) Mayfly Dun Pictures

Collection details
Location: Nome Creek, Alaska
Date: July 10th, 2011
Added to site: July 16th, 2011
Author: Troutnut
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