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Troutnut Forum > Fly Hatch Talk > PMD Spinner - Egg sack color?

This topic is about the Mayfly Species Ephemerella excrucians

Until recently, Ephemerella excrucians was a widespread species of relatively minor importance. Recent work by entomologists uncovered that it is the same species as the important Western Pale Morning Duns Ephemerella inermis, and the two combined took the name of excrucians.

The behavioral information I've given below is tentative. Because of the taxonomic shuffling and the fact that books usually describe this species together with others, it is a little bit unclear which writings specifically apply to excrucians. Read more...

The Discussion

WbranchJanuary 26th, 2010, 7:07 pm
York & Starlight PA

Posts: 559
Do any of you entomologist types know the true color of the PMD spinner? Dorothea or excrucians. Where I fish in MT there are huge spinner falls, many spents are on the water in the morning and others fall again at various periods during the day. I'd like to tie some with egg sacks as I saw many in July but forgot what color they were. Thanks.
Catskill fly fisher for fifty years.
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Replies:
TaxonJanuary 27th, 2010, 1:01 am
Mercer Island, WA

Posts: 714
Matt-

Ernest Schwiebert described Ephemerella dorothea dorothea ova as golden yellow, and Ephemerella excrucians ova as yellowish.
Roger Rohrbeck
www.FlyfishingEntomology.com
WbranchJanuary 27th, 2010, 5:43 am
York & Starlight PA

Posts: 559
Roger,

I would of bet my box of PMD's that you would of been the person who answered my question. Thanks for the data.
Catskill fly fisher for fifty years.
WiflyfisherJanuary 27th, 2010, 9:09 am
Wisconsin

Posts: 356
E. dorothea of the Upper Midwest have a definite yellowish egg sack. I never looked that closely at the PMDs out West. I was always focused on the big gulping rainbows near me.
John S.
http://www.WiFlyFisher.com
TaxonJanuary 27th, 2010, 1:59 pm
Mercer Island, WA

Posts: 714
Roger,

I would of bet my box of PMD's that you would of been the person who answered my question. Thanks for the data.


Matt-

Rather a safe bet, that!
Roger Rohrbeck
www.FlyfishingEntomology.com
TaxonJanuary 27th, 2010, 2:00 pm
Mercer Island, WA

Posts: 714
Roger,

I would of bet my box of PMD's that you would of been the person who answered my question. Thanks for the data.


Matt-

Rather a safe bet, but you are certainly welcome.
Roger Rohrbeck
www.FlyfishingEntomology.com
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