 "Acer taurocursum" is represented by a solitary fossil specimen from the northeasternmost part of Nevada.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 .Radiometric dating of the layers of volcanic ash above and below the flora reported in 1966 indicated an age of approximately .