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Artistic view of a Male Pteronarcys californica (Pteronarcyidae) (Giant Salmonfly) Stonefly Adult from the Gallatin River in Montana
Salmonflies
Pteronarcys californica

The giant Salmonflies of the Western mountains are legendary for their proclivity to elicit consistent dry-fly action and ferocious strikes.

Dorsal view of a Ephemerella mucronata (Ephemerellidae) Mayfly Nymph from the Yakima River in Washington
This is an interesting one. Following the keys in Merritt R.W., Cummins, K.W., and Berg, M.B. (2019) and Jacobus et al. (2014), it keys clearly to Ephemerella. Jacobus et al provide a key to species, but some of the characteristics are tricky to interpret without illustrations. If I didn't make any mistakes, this one keys to Ephemerella mucronata, which has not previously been reported any closer to here than Montana and Alberta. The main character seems to fit well: "Abdominal terga with prominent, paired, subparallel, spiculate ridges." Several illustrations or descriptions of this holarctic species from the US and Europe seem to match, including the body length, tarsal claws and denticles, labial palp, and gill shapes. These sources include including Richard Allen's original description of this species in North America under the now-defunct name E. moffatae in Allen RK (1977) and the figures in this description of the species in Italy.
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.

Female Leptophlebia cupida (Black Quill) Mayfly Spinner Pictures

Female Leptophlebia cupida (Leptophlebiidae) (Black Quill) Mayfly Spinner from the Namekagon River in Wisconsin
Lateral view of a Female Leptophlebia cupida (Leptophlebiidae) (Black Quill) Mayfly Spinner from the Namekagon River in Wisconsin
Female Leptophlebia cupida (Leptophlebiidae) (Black Quill) Mayfly Spinner from the Namekagon River in Wisconsin
Female Leptophlebia cupida (Leptophlebiidae) (Black Quill) Mayfly Spinner from the Namekagon River in Wisconsin
Female Leptophlebia cupida (Leptophlebiidae) (Black Quill) Mayfly Spinner from the Namekagon River in Wisconsin
Ventral view of a Female Leptophlebia cupida (Leptophlebiidae) (Black Quill) Mayfly Spinner from the Namekagon River in Wisconsin
Dorsal view of a Female Leptophlebia cupida (Leptophlebiidae) (Black Quill) Mayfly Spinner from the Namekagon River in Wisconsin
Female Leptophlebia cupida (Leptophlebiidae) (Black Quill) Mayfly Spinner from the Namekagon River in Wisconsin

This mayfly was collected from the Namekagon River in Wisconsin on May 28th, 2005 and added to Troutnut.com by Troutnut on May 24th, 2006.

Discussions of this Spinner

Leptophlebia cupida
3 replies
Posted by Martinus on Dec 18, 2011
Last reply on Dec 19, 2011 by PaulRoberts
effectivement belle éphémère, cupida est une des premières a apparaitre en rivière au printemps. Elle est suivie de près par nebulosa.


Martin Grenier
Leptophlebia cupida
Posted by Martinus on Dec 18, 2011
Last reply on Dec 18, 2011 by Martinus
actually beautiful cupida ephemeral, is one of the first a appear in the River in the spring. It is followed closely by nebulosa.


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References

Female Leptophlebia cupida (Black Quill) Mayfly Spinner Pictures

Collection details
Location: Namekagon River, Wisconsin
Date: May 28th, 2005
Added to site: May 24th, 2006
Author: Troutnut
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