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Lateral view of a Male Baetis (Baetidae) (Blue-Winged Olive) Mayfly Dun from Mystery Creek #43 in New York
Blue-winged Olives
Baetis

Tiny Baetis mayflies are perhaps the most commonly encountered and imitated by anglers on all American trout streams due to their great abundance, widespread distribution, and trout-friendly emergence habits.

The Namekagon River in Wisconsin

Stream photos

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Skwala (Large Springfly) Stonefly NymphSkwala (Large Springfly) Stonefly Nymph
Dorsal view of a Skwala (Perlodidae) (Large Springfly) Stonefly Nymph from the Yakima River in Washington
This Skwala nymph still has a couple months left to go before hatching, but it's still a good representative of its species, which was extremely abundant in my sample for a stonefly of this size. It's obvious why the Yakima is known for its Skwala hatch.
6 Recently Added Photos
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.
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Stonefly Genus Acroneuria (Golden Stones)

This abundant genus has three important East/Midwest species. The superabundant species in the West have been moved to the new genera Calineuria and Hesperoperla.

Where & when

In 163 records from GBIF, adults of this genus have mostly been collected during June (45%), July (23%), and May (21%).

In 50 records from GBIF, this genus has been collected at elevations ranging from 20 to 10663 ft, with an average (median) of 1721 ft.

Genus Range
Map of specific collection sites

Identification

To determine whether a specimen of Perlidae belongs to Acroneuria, use the Key to Genera of Perlidae Nymphs.

Specimens of the Stonefly Genus Acroneuria

1 Female Adult
Female Acroneuria lycorias (Golden Stone) Stonefly Adult
17 Pictures
Lateral view of a Female Acroneuria lycorias (Perlidae) (Golden Stone) Stonefly Adult from Aquarium (collected somewhere in Catskills) in New York
Added by Troutnut on June 4, 2007
Collected May 22, 2007 from Aquarium (collected somewhere in Catskills) in New York and added by Troutnut on June 4, 2007
6 Nymphs

Start a Discussion of Acroneuria

References

Stonefly Genus Acroneuria (Golden Stones)

Taxonomy
  1. Kingdom Animalia (Animals)
  2. » Phylum Arthropoda (Arthropods)
  3. » Class Insecta (Insects)
  4. » Order Plecoptera (Stoneflies)
  5. » Family Perlidae (Golden Stones)
  6. » Genus Acroneuria (Golden Stones)
Species in Acroneuria
Acroneuria abnormisCommon Stone
3
32
Acroneuria arenosaEastern Stone
0
0
Acroneuria carolinensisCarolina Stoneflies
1
3
Acroneuria kosztarabiVirginia Stone
0
0
Acroneuria lycoriasBoreal Stoneflies
3
29
Species in Acroneuria: Acroneuria abnormis, Acroneuria arenosa, Acroneuria carolinensis, Acroneuria kosztarabi, Acroneuria lycorias
10 species (Acroneuria arida, Acroneuria evoluta, Acroneuria filicis, Acroneuria flinti, Acroneuria frisoni, Acroneuria hitchcocki, Acroneuria internata, Acroneuria ozarkensis, Acroneuria perplexa, and Acroneuria petersi) aren't included.
Genus Range
Map of specific collection sites
Common Names
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