Current View: All Antweb
Change View
Cite this page

Citing AntWeb


To cite this page, please use the following:

· For print:      Citation: AntWeb. Version 8.33. California Academy of Science, online at Accessed .

· For web:

Species: Tetramorium tsushimae   Emery, 1925 

Download Data

Taxonomic History (provided by Barry Bolton, 2020)

Tetramorium caespitum subsp. tsushimae Emery, 1925a PDF: 187, fig. C (w.q.) JAPAN. Palearctic. AntCat AntWiki HOL

Taxonomic history

Junior synonym of Tetramorium caespitum jacoti: Wheeler, 1927d PDF: 7 (error).
[Wheeler gives Tetramorium caespitum jacoti as senior synonym, but Tetramorium tsushimae has priority and is the first available name for this taxon: Bolton, 1995b: 415.].
Raised to species: Bolton, 1995b: 415.
[For current synonymy of Tetramorium tsushimae see under its junior synonym Tetramorium caespitum jacoti.].


  Geographic regions (According to curated Geolocale/Taxon lists):
    Americas: United States
    Asia: China, Japan, Mongolia
  Biogeographic regions (According to curated Bioregion/Taxon lists):
    Nearctic, Palearctic
  Native to (according to species list records):
    Palearctic bioregion

Distribution Notes:

Urban & ruderal within 20 km. radius of St. Louis, MO (as of 2005)


An aggressive tramp species, the only ant which is highly invasive outdoors in Illinois's climate. Dispersed in sod, nursery stock and loads of soil or gravel.


Tuft of hair on gula absent, present on Tetramorium immigrans.


Native to Japan, Korea, eastern temperate China, T. tsushimae apparently was introduced into urban St. Louis during the early 20th century, it has in recent decades begun to spread rapidly to other Missouri and Illinois cities, probably in shipments of soil and gravel.

Specimen Habitat Summary

Found most commonly in these habitats: 1 times found in Suburban with wide-spaced hardwood trees, 1 times found in in garden in full sun, 1 times found in in greenhouse on Bombax.

Found most commonly in these microhabitats: 1 times under flat rock.

Collected most commonly using these methods: 2 times Search, 4 times direct collection.

Elevations: collected from 64 - 935 meters, 262 meters average

Collect Date Range: collected between 1920-10-10 and 2017-08-21

Type specimens: syntype of Tetramorium caespitum jacoti: casent0901253; syntype of Tetramorium tsushimae: casent0904809; Type of unavailable quadrinomial: Tetramorium caespitum tsushimae coeleste: casent0915089; Type of unavailable quadrinomial: Tetramorium caespitum tsushimaeum pullum: casent0915090

See something amiss? Send us an email.