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This formation is similar in age to the Solnhofen Limestone Formation in Germany and the Tendaguru Formation in Tanzania
It is an aquatic insect that had a very light-weight body and long legs that allow them to live on the surface of the water
and abdomen are well preserved
Today Ailanthus is survived by ten living species and the genus is native only to Asia
The available morphological characters place the fossil species within the Salicaceae as an immediate sister to the clade containing Populus and Salix
Eocene Green River Undescribed Birthwort P-GRP2-16-013 Fossil Flower This formation is similar inUndescribed Birthwort Green River Formation Middle Eocene Lincoln County, Wyoming This extraordinary example is interpreted to be an undescribed Birthwort leaf possible from the family Aristolochiaceae. Birthworts (also known as pipevine or Dutchman's pipe) are perennial herbaceous plants, shrubs, and vines. There are about 400 living specie today. These plant leaves are rare in the Green River Formation. This specimen is from the 18 inch layer. The