Here is a nice fossil insect of the species Tipula (Tipula) americana.
The fossil crane fly has a wing span of approx. 32 mm.
The species Tipula americana is characterized by wing veins
According to Kania et al., 2018 particularly by the M1 and M2 ramifications at the wing tip. In this point, this species differs significantly from Tipula sepulchri Scudder, 1890 and Tipula spoliata Scudder, 1890 which were also been described from the Green River Formation.

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