Ephemeroptera: Ephemeridae & Potamanthidae (Burrowing Mayflies)
- 3 pairs of jointed legs, each with a single claw; 3 tail-like filaments with dense fringe on inside edges.
- 1 pair of wingpads apparent.
- Forked, fringed gills with tufts along abdomen.
- A pair of tusks projecting forward from mouthparts and visible from above.
- Body pale cream colored or tan with brown or white markings.
Length: 8 mm to 32 mm
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