Acer alvordense

Taxonavigation

Taxonavigation: Sapindales
Classification System: APG IV Superregnum: Eukaryota Cladus: Diaphoretickes Cladus: CAM Cladus: Archaeplastida Regnum: Plantae Cladus: Angiosperms Cladus: Eudicots Cladus: Core eudicots Cladus: Rosids Cladus: Eurosids II Ordo: Sapindales

Familia: Sapindaceae
Subfamilia: Hippocastanoideae
Tribus: Acereae
Genus: Acer
Sectio: Acer sect. Macrophylla
Species:†Acer alvordense

Name

†Acer alvordense Axelrod Publ. Carnegie Inst. Washington, 261. pl. 45, f.6, 7; pl.46, f.1,2. 15 Jun 1944

Synonyms

• Pro Parte, non-typic
  • †Acer oregonianum auct. non Knowlton. Becker. 1969 (part). 113 . pl. 35. f. 16.

Type material

• Cotypes: UCMP 2136, 2137 A&B, 2138 (leaves) 2139, 2140 (fruits)
  • Repository: Museum of Paleontology, University of California Berkeley, Berkeley, Alameda County, California, Unites States

• Referred material: UCMP 9122-9124 (leaves) 9125, 9126 (fruits)
  • Repository: Museum of Paleontology, University of California Berkeley, Berkeley, Alameda County, California, Unites States

• Referred material: YPM/NYBG 504, 510 (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.

Type locality

• Miocene, Langhian to Serravallian; Alvord Creek Formation; Alvord Creek (UCMP N601), Steens Mountain, Harney County, Oregon, United States

Etymology

• None given

Distribution

Eocene

• Priabonian/Chadronian
  • Renova Formation; Beaverhead, Beaver Creek, Powell County, Montana, United States
  • Renova Formation; Christensen Ranch (Becker 32), Powell County, Montana, United States

Miocene

• Langhian to Serravallian
  • Alvord Creek Formation; Alvord Creek (UCMP N601), Steens Mountain, Harney County, Oregon, United States

References

Primary references

• Axelrod, D.I. 1944. The Alvord Creek flora. Publications of the Carnegie Institution of Washington 553: 225–262, pl. 40–46. ISSN 0099-4936.  HathiTrust 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. 

Links

• IFPNI International Editorial Board 2014–2026. The International Fossil Plant Names Index. Acer alvordense. Published online. Accessed: 2026 Jan 03.