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Light Cahill Spinners

Like most common names, "Light Cahill Spinner" can refer to more than one taxon. They're previewed below, along with 5 specimens. For more detail click through to the scientific names.

Mayfly Genus Stenacron

These are sometimes called Light Cahill Spinners.
The species in this genus were formerly classified in Stenonema. See the genus Maccaffertium for details. Only one species, Stenacron interpunctatum, is important to fly fishermen. See its page for details.
Stenacron interpunctatum (Light Cahill) Mayfly NymphStenacron interpunctatum (Light Cahill) Mayfly Nymph View 7 Pictures
Collected June 5, 2005 from in
Added to Troutnut.com by on May 25, 2006
Male Stenacron (Light Cahills) Mayfly DunMale Stenacron (Light Cahills) Mayfly Dun View 13 Pictures
Collected May 27, 2005 from in
Added to Troutnut.com by on May 22, 2006
Male Stenacron interpunctatum (Light Cahill) Mayfly SpinnerMale Stenacron interpunctatum (Light Cahill) Mayfly Spinner View 8 Pictures
Collected June 10, 2005 from in
Added to Troutnut.com by on May 26, 2006

Mayfly Species Maccaffertium ithaca

These are sometimes called Light Cahill Spinners.
Maccaffertium ithaca (Light Cahill) Mayfly NymphMaccaffertium ithaca (Light Cahill) Mayfly Nymph View 9 PicturesThis specimen seems to be of the same species as a dun I photographed which emerged from another nymph in the same sample.
Collected May 29, 2007 from in
Added to Troutnut.com by on June 4, 2007
Female Maccaffertium ithaca (Light Cahill) Mayfly DunFemale Maccaffertium ithaca (Light Cahill) Mayfly Dun View 10 PicturesThis female looks very much like a male I collected a few hundred miles away a few days later, so I'm guessing it's the same species, which I believe is Maccaffertium mediopunctatum.
Collected May 23, 2007 from in
Added to Troutnut.com by on June 4, 2007

Mayfly Species Cinygma dimicki

These are very rarely called Light Cahill Spinners.
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