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Lateral view of a Female Hexagenia limbata (Ephemeridae) (Hex) Mayfly Dun from the Namekagon River in Wisconsin
Hex Mayflies
Hexagenia limbata

The famous nocturnal Hex hatch of the Midwest (and a few other lucky locations) stirs to the surface mythically large brown trout that only touch streamers for the rest of the year.

Slough Creek in Wyoming

Stream photos

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Holocentropus Caddisfly LarvaHolocentropus Caddisfly Larva
Dorsal view of a Holocentropus (Polycentropodidae) Caddisfly Larva from the Yakima River in Washington
This one seems to tentatively key to Holocentropus, although I can't make out the anal spines in Couplet 7 of the Key to Genera of Polycentropodidae Larvae nor the dark bands in Couplet 4 of the Key to Genera of Polycentropodidae Larvae, making me wonder if I went wrong somewhere in keying it out. I don't see where that could have happened, though. It might also be that it's a very immature larva and doesn't possess all the identifying characteristics in the key yet. If Holocentropus is correct, then Holocentropus flavus and Holocentropus interruptus are the two likely possibilities based on range, but I was not able to find a description of their larvae.
11 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 Paragnetina (Golden Stones)

Paragnetina media is an important species in both the East and the Midwest, and Paragnetina immarginata is important in the East.

Where & when

In 67 records from GBIF, adults of this genus have mostly been collected during June (33%), July (24%), May (21%), August (9%), and April (6%).

In 10 records from GBIF, this genus has been collected at elevations ranging from 600 to 3802 ft, with an average (median) of 1148 ft.

Genus Range
Map of specific collection sites

Identification

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

Specimens of the Stonefly Genus Paragnetina

1 Male Adult
Male Paragnetina immarginata (Beautiful Stonefly) Stonefly Adult
9 Pictures
Lateral view of a Male Paragnetina immarginata (Perlidae) (Beautiful Stonefly) Stonefly Adult from Brodhead Creek in Pennsylvania
Added by Troutnut on June 4, 2007
Collected May 28, 2007 from Brodhead Creek in Pennsylvania and added by Troutnut on June 4, 2007
2 Female Adults
3 Nymphs

Start a Discussion of Paragnetina

Stonefly Genus Paragnetina (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 Paragnetina (Golden Stones)
Species in Paragnetina
Paragnetina immarginataBeautiful Stoneflies
1
9
Paragnetina mediaEmbossed Stoneflies
4
27
Species in Paragnetina: Paragnetina immarginata, Paragnetina media
3 species (Paragnetina fumosa, Paragnetina ichusa, and Paragnetina kansensis) aren't included.
Genus Range
Map of specific collection sites
Common Names
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