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.
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I caught this tiny larva without a case, but it seems to key pretty clearly to to Glossosomatidae. From there, the lack of sclerites on the mesonotum points to either Glossosoma or Anagapetus. Although it's difficult to see in a 2D image from the microscope, it's pretty clear in the live 3D view that the pronotum is only excised about 1/3 of its length to accommodate the forecoxa, not 2/3, which points to Glossosoma at Couplet 5 of the Key to Genera of Glossosomatidae Larvae.
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Dragonfly Family Gomphidae
Where & when
In 151 records from GBIF, adults of this family have mostly been collected during June (21%), August (21%), July (20%), September (18%), May (13%), and October (5%).
In 9 records from GBIF, this family has been collected at elevations ranging from 262 to 2723 ft, with an average (median) of 869 ft.
Family Range
Specimens of the Dragonfly Family Gomphidae
6 Nymphs
1 Video of Gomphidae Dragonflies:
Dragonfly Nymph Scooting Around
Dragonfly nymphs propel themselves through the water with a miniature jet engine, taking water in below their mouths and shooting it out their back ends. You can see the ripples from the jet out this one's back in this video.
Featuring: Gomphidae Dragonfly Nymph
Start a Discussion of Gomphidae
Dragonfly Family Gomphidae
Taxonomy
Genus in Gomphidae
Hagenius
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Genus in Gomphidae: Hagenius