Acer ferrignoi is an extinct maple species in the family Sapindaceae described from a group of fossil leaves.

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

Wolfe and Tanai published their 1987 type description for A. ferrignoi in the Journal of the Faculty of Science, Hokkaido University.

[1] The etymology of the chosen specific name ferrignoi is in recognition of James P. Ferrigno, who located and supplied access to collections of fossils housed in the Smithsonian Institutions National Museum of Natural History.

[1] At the time of description the A. ferrignoi holotype specimen, number NMNH 396125, along with the four paratypes were part of the National Museum of Natural History collections.