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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.

Amphipoda (Scud) Arthropod Adult Pictures

Amphipoda (Scud) Arthropod Adult from Salmon Creek in New York
Amphipoda (Scud) Arthropod Adult from Salmon Creek in New York
Amphipoda (Scud) Arthropod Adult from Salmon Creek in New York
Amphipoda (Scud) Arthropod Adult from Salmon Creek in New York
Amphipoda (Scud) Arthropod Adult from Salmon Creek in New York
Ventral view of a Amphipoda (Scud) Arthropod Adult from Salmon Creek in New York
A freshwater amphipod (scud). Tiny crustacean common to many freshwater environments

Dorsal view of a Amphipoda (Scud) Arthropod Adult from Salmon Creek in New York

This arthropod was collected from Salmon Creek in New York on March 29th, 2006 and added to Troutnut.com by Troutnut on April 7th, 2006.

Discussions of this Adult

wtf
3 replies
Posted by Trouthater on Sep 6, 2006
Last reply on Mar 19, 2009 by Sandfly
gross
midwest as well?
1 replies
Posted by ReAlizm on Mar 6, 2009
Last reply on Mar 6, 2009 by CharlieSawd
I'm from Missouri, and I'm wondering if this species of scud could also me found in the midwest?

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References

Amphipoda (Scud) Arthropod Adult Pictures

Collection details
Location: Salmon Creek, New York
Date: March 29th, 2006
Added to site: April 7th, 2006
Author: Troutnut
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