Detail of Trichoptera fossil cases with incorporated fragments of Corixidae elytra from Canyon Ferry insect fossil site (age 31 mybp).
From: J. J. Giersch, D. E. Ruiter, and M. A. Ivie. 2001. Trichoptera from an Oligocene-Early Miocene insect and plant lagerstätten in Montana. 2001 meeting of the Entomological Society of America, San Diego, CA (Poster).
Digital photographs enhanced with PhotoShop, layout in Illustrator.
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