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Cream Cahills

Like most common names, "Cream Cahill" 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 Species Stenonema femoratum

These are often called Cream Cahills.
This species is only one of many minor Light Cahills and the only species remaining in the Stenonema genus after the classic superhatches were reclassified into Maccaffertium and Stenacron. Its habitat and behavior is not different from those species, except as noted below, and you should consult the pages for those genera if you need angling information for this hatch.
Stenonema femoratum (Cream Cahill) Mayfly NymphStenonema femoratum (Cream Cahill) Mayfly Nymph View 6 Pictures
Collected May 6, 2007 from in
Added to Troutnut.com by on May 18, 2007

Mayfly Species Maccaffertium mediopunctatum

These are often called Cream Cahills.
I have seen no mention of this species as a fishable hatch in angling literature, but it is noteworthy for the unusual coloration of the male spinners, which Malcolm and Knopp describe in Mayflies: An Angler's Study of Trout Water Ephemeroptera :

...the male only exhibits this coloration on segments eight to ten, against an otherwise whitish to translucent body.
Maccaffertium mediopunctatum (Cream Cahill) Mayfly NymphMaccaffertium mediopunctatum (Cream Cahill) Mayfly Nymph View 4 Pictures
Collected June 8, 2005 from in
Added to Troutnut.com by on May 26, 2006

Mayfly Species Maccaffertium mexicanum

These are often called Cream Cahills.
This species is usually mentioned under its former name, Stenonema integrum. Now integrum is a subspecies (Subspecies: Entomologists sometimes further divide a species into distinct groups called subspecies, which have two lower-case words on the end of their scientific name instead of one. The latter is the sub-species name. For example, Maccaffertium mexicanum mexicanum and Maccaffertium mexicanum integrum are two different subspecies of Maccaffertium mexicanum.) of Maccaffertium mexicanum. It is not said to produce fishable hatches.

I've tentatively identified several specimens I collected as members of this species based on their color patterns. It may be more likely that they belong to a Midwestern color variety of Maccaffertium vicarium which produces good hatches on the river where they were collected.

Mayfly Species Maccaffertium modestum

These are often called Cream Cahills.
Maccaffertium modestum (Cream Cahill) Mayfly NymphMaccaffertium modestum (Cream Cahill) Mayfly Nymph View 3 Pictures
Collected January 13, 2004 from in
Added to Troutnut.com by on January 25, 2006
Male Maccaffertium modestum (Cream Cahill) Mayfly DunMale Maccaffertium modestum (Cream Cahill) Mayfly Dun View 6 Pictures
Collected June 4, 2005 from in
Added to Troutnut.com by on May 24, 2006
Male Maccaffertium modestum (Cream Cahill) Mayfly SpinnerMale Maccaffertium modestum (Cream Cahill) Mayfly Spinner View 4 Pictures
Collected August 5, 2004 from in
Added to Troutnut.com by on January 25, 2006
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