Several horseshoe trackways made by wingless monuran insects indicating heavy use of a mud flat, because all of the trackways must have formed during a short span of time. We know these tracks were made by monurans, because the same kinds of insects are alive today and make the same kinds of tracks. From the Steven C. Minkin Paleozoic Footprint Site in Walker County, Alabama. Scale in centimeters.
Courtesy of Alabama Paleontological Society