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Mayfly Genus Stenonema

"Stenonema" as we knew it is no more.

The name is still popular with anglers, primarily due to extensive literary use of the name over the years. It has attained an almost iconic status. Entomologists, whose concern is rightly science not angling tradition, have since moved all the best-known species to new genera. As an aid to anglers familiar with the old names who have come to this page looking for information, please redirect to the following pages by clicking on the highlighted names:

March Brown (Stenonema vicarium) - Maccaffertium vicarium
Gray Fox (Stenonema fuscum) - Maccaffertium vicarium
Light Cahill (Stenonema canadense) - Stenacron interpunctatum

Only one species (and of minor importance to anglers) remains in the Stenonema genus: Stenonema femoratum. You can find additional information on this species by going to its hatch page.

Recent Discussions of Stenonema

Stenonema femoratum male spinner 3 Replies »
Posted by Jmw975 on May 21, 2012
Last reply on May 21, 2012 by Entoman
Male Stenonema femoratum collected from the Grand River, Ontario. Note the 3 spots at the hind margins of each of the abdominal segments.


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