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.

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Isoperla (Stripetails and Yellow Stones) Stonefly Adult Isoperla (Stripetails and Yellow Stones) Stonefly Adult

Dorsal view of a Isoperla (Perlodidae) (Stripetails and Yellow Stones) Stonefly Adult from Mystery Creek #308 in Washington

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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.

Troutnut is a project started in 2003 by salmonid ecologist Jason "Troutnut" Neuswanger to help anglers and fly tyers unabashedly embrace the entomological side of the sport. Learn more about Troutnut or support the project for an enhanced experience here.

Maccaffertium mediopunctatum

Stenonema ithaca (Light Cahill) Mayfly Nymph

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Lateral view of a Stenonema ithaca (Heptageniidae) (Light Cahill) Mayfly Nymph from Paradise Creek in Pennsylvania

This specimen seems to be of the same species as a dun I photographed which emerged from another nymph in the same sample.

Collected May 28, 2007 from Paradise Creek in Pennsylvania

Added by Troutnut on June 4, 2007

Collected May 28, 2007 from Paradise Creek in Pennsylvania and added by Troutnut on June 4, 2007

Taxon

Site Editor
Plano, TX

Posts: 1311

Taxon on Jun 5, 2007June 5th, 2007, 9:52 am EDT

Maccaffertium is a Latinized version of the name of the world-renowned mayfly systematist, W. Patrick McCafferty. And, mediopunctatum is constructed from roots of medi- meaning middle, and punct- meaning point, so I assume this species has some distinctive feature midpoint in its anatomy. Assuming my logic is valid, perhaps someone else can tell you what the feature is.

The distribution of this species is confined to the states and provinces lying east of the N. American continental divide.

Best regards,
Roger Rohrbeck
www.FlyfishingEntomology.com

Quillgordon
Schuylkill County, PA.

Posts: 109

Quillgordon on Jun 5, 2007June 5th, 2007, 11:37 am EDT

Taxon,
OK....... I understood the Maccaffertium, but didn't get the 'mediopunctatum' ending. I had two years of German, but no Latin.
This one has a mark down the center of its back( dorsal), maybe that has some relevenance. I don't recall that particular marking on my specimens, but they have those distinctive markings on the belly(ventral side). I find those markings very interesting.

John...

Flyfishing is a state of mind! .............. Q.g.

C/R........barbless