Acer taurocursum is an extinct maple species in the family Sapindaceae described from a single fossil samara found in Late Eocene lakebed sediments exposed in the state of Nevada, US.

The specimen was described by Jack A. Wolfe and Toshimasa Tanai from the "Bull Run" flora UCMP location P562, which was preserved in lacustrine sedimentation associated with extensive intermittent volcanism between 43 to 38 million years ago.

Radiometric dating of the layers of volcanic ash above and below the flora reported in 1966 indicated an age of approximately 41 million years ago.

[1] The specimen was studied by paleobotanists Jack A. Wolfe of the United States Geological Survey, Denver office and Toshimasa Tanai of Hokkaido University.

[1] The etymology of the chosen specific name taurocursum is in recognition of the type location for the species in the Bull Run flora of Nevada.