Isoperla fusca (Yellow Sally) Stonefly Nymph Pictures

Classification

This specimen keys to Isoperla fusca using the key in Szczytko & Stewart 1979, but some species of Isoperla weren't represented there.

This stonefly was collected from the Yakima River on April 9th, 2021 and added to Troutnut.com on April 12th, 2021.

View Full Size and Comment (5.6X larger)

View Full Size and Comment (4.9X larger)

View Full Size and Comment (6.7X larger)

View Full Size and Comment (4.2X larger)

View Full Size and Comment (4.1X larger)

View Full Size and Comment (6.7X larger)

View Full Size and Comment (5.3X larger)

View Full Size and Comment (5.2X larger)

View Full Size and Comment (4X larger)

View Full Size and Comment (5.4X larger)

The row of stout setae along the back of the head (anterior of the occiput) on this specimen was relevant to the species ID.

View Full Size and Comment (3.8X larger)

View Full Size and Comment (4.2X larger)

Start a Discussion of this Nymph:

You must log in at the top of the page to post. If you haven't registered yet, it's this easy: