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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.

Lateral view of a Psychodidae True Fly Larva from Mystery Creek #308 in Washington
This wild-looking little thing completely puzzled me. At first I was thinking beetle or month larva, until I got a look at the pictures on the computer screen. I made a couple of incorrect guesses before entomologist Greg Courtney pointed me in the right direction with Psychodidae. He suggested a possible genus of Thornburghiella, but could not rule out some other members of the tribe Pericomini.
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.

Stonefly Species Allocapnia polemistis (Little Snowflies)

Species Range

Physical description

Most physical descriptions on Troutnut are direct or slightly edited quotes from the original scientific sources describing or updating the species, although there may be errors in copying them to this website. Such descriptions aren't always definitive, because species often turn out to be more variable than the original describers observed. In some cases, only a single specimen was described! However, they are useful starting points.

Source: The Winter Stoneflies (Plecoptera: Capniidae) Of Mississippi

Male tergal process. Tergum 8 process rests on a large oval ridge and bears a thin, compressed dorsal crest. Anterior face of process bent abruptly near apex, and anterodorsal surface devoid of scale-like tubercles (Figs. 28 - 29).

Female subgenital plate. Abdominal sterna 7 and 8 completely separated by membrane. Posterior margin of subgenital plate usually without projecting mesal lobe; anterior margin of sternum 8 bears a pair of small basolateral lobes (Figs. 30, 62). Source: New Records Of Winter Stoneflies (Plecoptera: Capniidae) In Mississippi


Start a Discussion of Allocapnia polemistis

Stonefly Species Allocapnia polemistis (Little Snowflies)

Taxonomy
Species Range
Resources
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