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.

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Tricorythodes (Trico) Mayfly Nymph Tricorythodes (Trico) Mayfly Nymph

Dorsal view of a Tricorythodes (Leptohyphidae) (Trico) Mayfly Nymph from Mystery Creek #308 in Washington

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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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Caecidotea sp.

Male Caecidotea (Cress Bug) Arthropod Adult

3 Pictures

Dorsal view of a Male Caecidotea (Asellidae) (Cress Bug) Arthropod Adult from the Namekagon River in Wisconsin

Collected January 12, 2004 from the Namekagon River in Wisconsin

Added by Troutnut on January 25, 2006

Collected January 12, 2004 from the Namekagon River in Wisconsin and added by Troutnut on January 25, 2006

Leonardo

México, D.F

Posts: 9

Leonardo on Mar 29, 2013March 29th, 2013, 12:57 pm EDT

Basically this is a male specimen of the features seen, the presence of robust gnatopods, the first pair of pleopods are modified and are seen in ventral view the second pleopods (These are present in females modified).

Troutnut

Administrator
Bellevue, WA

Posts: 2758

Troutnut on Mar 30, 2013March 30th, 2013, 12:50 pm EDT

Thanks!

Jason Neuswanger, Ph.D.
Troutnut and salmonid ecologist

Hex MayfliesHexagenia limbata

Troutnut Forum › Specimen Discussion › Caecidotea sp.