Cranefly Family: Tipulidae; Robber Fly: Family Asilidae
Fly: 10 mm long body, 11 mm long wings. Robber Fly; 11 mm long body 7
mm long wings Matrix: 80 mm by 66 mm.
Site: Green River Shale, Uintah County, Utah
Green River Formation deposits of Wyoming, Colorado, and Utah are
best known for their immaculately-preserved fish, but other examples
are known as well, as this specimen attests. An exceptionally-preserved
pair of members of the Diptera, with venation in the wings evident,
despite its 50 million year age, this is a world-class example of
the type of preservation found in the Green River fossil site.