Acer elwyni

Familia: Sapindaceae
Subfamilia: Hippocastanoideae
Tribus: Acereae
Genus: Acer
Sectio: †A. sect. Glabroidea
Species:†Acer elwyni

†Acer elwyni (H.F.Becker) J.A.Wolfe & Tanai J. Fac. Sci. Hokkaido Univ., Ser. 4, Geol., 22(1): 119-120. pl. 7, figs. 1-4, 7, 8; pl. 11, figs. 12- 15, 17; text-fig. 16C 14 Feb 1987

• Homotypic
• †Quercus elwyni H.F.Becker. 1960. 103. pl. 19. f. 5-7; pl. 28, f. 1-7.
• †Crataegus elwyni (H.F.Becker) H.F.Becker. 1972 (part). 39. pl. 9, f. 1-11.
• Pro Parte, non-typic
• †Acer aequidentatum auct. non Lesquereux. H.F.Becker. 1960. 113. pl. 23, f. 3; pl. 32, f. 5.
• †Acer florissanti auct. non W.C.G.Kirchner. H.F.Becker. 1961 (part). 79, pl. 25, f. 9.
• †Acer glabroides auct. non R.W.Brown. H.F.Becker. 1961 (part). 80, pl. 25. f. 9.
• †Acer glabroides auct. non R.W.Brown. H.F.Becker. 1966. 109. pl. 4, f. 2-4.
• †Acer glabroides auct. non R.W.Brown. H.F.Becker. 1969. 113. pl. 36, f. 1.
• †Acer glabroides auct. non R.W.Brown. H.F.Becker. 1972. 44. pl. 11, f. 17-26.
• †Acer minor auct. non Knowlton. H.F.Becker. 1972. 45, pl. 11. f. 15-16.
• Acer, samaras. H.F.Becker. 1960. pl. 32, f. 6; pl. 33, f. 6, 7.

• Holotype: UMMP 36429 (leaf)
  • Repository: University of Michigan Museum of Paleontology, Ann Arbor, Washtenaw County, Michigan, United States
• Referred Material: UMMP 36430-36435, 36487, 36937, 51456 A&B (leaves) 36488, 51457 (fruits)
  • Repository: Museum of Paleontology, University of California Berkeley, Berkeley, Alameda County, California, Unites States
• Referred Material: YPM/NYBG 828, 1642-1647, 1649, 1650, 1954-1956, 2033, 2072. 2075, 2076 (leaves) 2081-2087, 2090-2094, 2097, 2099, 2193 (fruits)
  • Repository: Paleobotany collections, Yale Peabody Museum, New Haven, Connecticut, United States
    • Note: Specimens originally in New York Botanic Gardens collection, transferred to the Yale Peabody Museum.
• Referred Material: USNM 396030, 396031 (leaves) 396029 (fruit)
  • Repository: United States National Museum, Smithsonian Institution, National Mall, Washington DC, United States

• Eocene, Latest Eocene-Earliest Oligocene; Renova Formation; Mormon Creek flora (-), Beaverhead Basin, Beaverhead County, Montana, United States

Eocene

• Latest Eocene-Earliest Oligocene;
  • Renova Formation; Grant (Becker 69, USGS 8513), Beaverhead Basin, Beaverhead County, Montana, United States
  • Renova Formation; Metzel Ranch (-), Beaverhead Basin, Beaverhead County, Montana, United States
  • Renova Formation; Mormon Creek (-), Beaverhead Basin, Beaverhead County, Montana, United States
  • Renova Formation; Ruby (-), Beaverhead Basin, Beaverhead County, Montana, United States
  • Renova Formation; York Ranch (-), Beaverhead Basin, Beaverhead County, Montana, United States

Oligocene

• Early Oligocene
  • ?, White River Group; Gas Hills (-), Granite Mountain, Natrona County, Wyoming, United States

• Becker, H.F. 1960. The Tertiary Mormon Creek flora from the upper Ruby River Basin in southwestern Montana. Palaeontographica. Abteilung B, Paläophytologie 107(4-6): 83-126. ISSN 0375-0299.  Reference page. 
• Becker, H.F. 1972. The Metzel Ranch flora of the upper Ruby river basin, southwestern Montana. Palaeontographica. Abteilung B, Paläophytologie 141(1-2): 1–61. ISSN 0375-0299.  Reference page. 
• Wolfe, J.A. & Tanai, T. 1987. Systematics, Phylogeny, and Distribution of Acer (maples) in the Cenozoic of Western North America. Journal of the Faculty of Science, Hokkaido University. Series 4, Geology and Mineralogy 22(1): 1–246.  PDF Reference page. 

• Becker, H.F. 1961. Oligocene plants from the upper Ruby River Basin, southwestern Montana. Memoir-Geological Society of America 82: 1–122. doi:10.1130/MEM82-p1. ISSN 0072-1069.  Reference page. 
• Becker, H.F. 1966. Additions to and revision of the Oligocene Ruby Paper Shale Flora of Southwestern Montana. Contributions from the Museum of Paleontology, University of Michigan 20(5): 89–119. ISSN 0097-3556.  PDF Reference page. 
• Becker, H.F. 1969. Fossil plants of the Tertiary Beaverhead Basins in Southwestern Montana. Palaeontographica. Abteilung B, Paläophytologie 127(1-6): 1–61. ISSN 0375-0299.  Reference page. 
• Butrim, M. J. & Royer, D. L. 2020. Leaf‐economic strategies across the Eocene–Oligocene transition correlate with dry season precipitation and paleoelevation. American Journal of Botany 107(12): 1772-1785. doi:10.1002/ajb2.1580.  Reference page. 

• IFPNI International Editorial Board 2014–56852-1. The International Fossil Plant Names Index. Acer elwyni. Published online. Accessed: 56852-1 2025 Dec.