Acer crataegifolium (Knowlton) LaMotte

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
Section: incertae sedis
Species: †Acer crataegifolium

Status: nomen dubium

The name of this taxon appears to be invalid under the relevant nomenclatural code, as it may be a junior homonym of Acer crataegifolium Siebold & Zucc., 1845.

Name

†Acer crataegifolium (Knowlton) LaMotte, Mem. Geol. Soc. Amer., 51: 53. 20 Jun 1952

Synonyms

Homotypic
- †Rulac crataegifolium Knowlton, Bull. U.S. Geol. Surv., (204): 77. Dec 1902
- †Negundo crataegifolium (Knowlton) Knowlton. Profess. Pap. U.S. Geol. Surv., 130: 150. Nov 1922

Homonyms

Senior homonyms
- Acer crataegifolium Siebold & Zucc., Abh. Math.-Phys. Cl. Königl. Bayer. Akad. Wiss. 4(2): 155 (1845)

Type material

Holotype: USNM 8533
- Repository: United States National Museum, Smithsonian Institution, National Mall, Washington DC, United States

Type Locality

Miocene, Aquitanian-Serravallian (Hemingfordian-Barstovian NALMA); Mascall Formation; Riverbank Locality IV/Van Horn’s Ranch, Grant County, Oregon, United States

Distribution

Miocene

Aquitanian-Serravallian (Hemingfordian-Barstovian NALMA)
- Mascall Formation; Riverbank Locality IV/Van Horn’s Ranch, Grant County, Oregon, United States

References

Primary references

Knowlton, F.H. (1902). "Fossil flora of the John Day Basin, Oregon". Bulletin of the United States Geological Survey. C, Systematic Geology and Paleontology. Vol. 58 (204). pp. 1–153, pl. 1–17. doi:10.3133/b204. Reference page.
LaMotte, R.S. (1952). Catalogue of the Cenozoic plants of North America through 1950. Geological Society of America Memoirs. Vol. 51. Geological Society of America. pp. 1–378. doi:10.1130/MEM51.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.

Additional references

Knowlton, F.H. (922). The Laramie flora of the Denver Basin, with a review of the Laramie problem. Professional Paper. Vol. 130. United States Geological Survey. pp. 1–175. doi:10.3133/pp130. Reference page.

Links

IFPNI International Editorial Board 2014–2026. The International Fossil Plant Names Index. Acer crataegifolium. Published online. Accessed: 2026 January 23.