Current View: Bolton World Catalog
Cite this page

Citing AntWeb


To cite this page, please use the following:

· For print:      Citation: AntWeb. Version 8.103.1. California Academy of Science, online at Accessed .

· For web:

Species: †Eoformica pinguis   (Scudder, 1877) 

Download Data

Current Valid Name:

Taxonomic History (provided by Barry Bolton, 2023)

Liometopum pingue Scudder, 1877b PDF: 742 (m.) U.S.A. (Wyoming, Green River Formation, Eocene). AntCat AntWiki HOL

Taxonomic history

Combination in Eoformica: Carpenter, 1930 PDF: 17.
// Distribution


  Geographic regions (According to curated Geolocale/Taxon lists):
    Americas: United States

Distribution Notes:

Green River Formation, several localities in Colorado, Montana, Utah, Wyoming, U.S.A.; middle Eocene, Lutetian (40-48 Ma).


Holotype MCZC-2937 in Museum of Comparative Zoology, Harvard University, Cambridge, Massachussetts, U.S.A.; other material available in U.S. National Museum, Smithsonian Institution, Washington D.C., U.S.A.; Paleontological Institute, Russian Academy of Sciences, Moscow, Russia; in Natural History Museum, London, U.K.

Taxonomic Notes:

Corrected as *pinguis: Bolton, 1995: 188


  • Scudder S.H., 1877. The first discovered traces of fossil insects in the American Tertiaries. Bulletin of the United States Geological and Geographical Survey of the Territories, 3: 741-762.
  • Carpenter F.M., 1930. The fossil ants of North America. Bulletin of the Museum of Comparative Zoology at Harvard University, 70: 1-66.
  • Bolton B., 1995. A new general catalogue of the ants of the world. Harvard University Press, Cambridge, Massachusetts, 504 pp.
  • Dlussky G.M. & Rasnitsyn A.P., 2002. Ants (Hymenoptera: Formicidae) of Formation Green River and some other Middle Eocene deposits of North America. Russian Entomological Journal, 11(4): 411-436.

Specimen Habitat Summary

Collect Date Range: collected between 1978-01-01 00:00:00.0 and 1984-01-01 00:00:00.0

Type specimens:

See something amiss? Send us an email.
Log In to see maps.