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Name: Fossil
Insects
Order: Diptera;
Cranefly Family: Tipulidae; Robber Fly: Family Asilidae
Geological
Time: Eocene
Size: Crane
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.
Fossil
Site: Green River Shale, Uintah County, Utah
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 The
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.
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