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Species: Tetramorium immigrans   Santschi, 1927 

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See Also:

Tetramorium immigrans_cf

Taxonomic History (provided by Barry Bolton, 2021)

Tetramorium caespitum var. immigrans Santschi, 1927b PDF: 54 (w.) CHILE. Neotropic. Primary type information: Type locality: Valparaíso (Chile), 33.05° S, 71.61° W, 18 m, leg (Edwards, 1926). Type depository: lectotype worker and seven paralectotype workers in NHMB. Type notes: Lectotype designation. Worker of middle card closer to needle than second worker, labeled "TYPE [–] "Chili Valparaiso, Miss Edwards" [–] "Tetramorium caespitum L immigrans Sant". SANTSCHI det. 19 "26" [–] Sammlung Dr. F. Santschi Kairouan", designated as lectotype (Fig. 19). AntCat AntWiki

Taxonomic history

// Distribution


  Geographic regions (According to curated Geolocale/Taxon lists):
    Americas: Canada, Chile, United States
    Europe: Bulgaria, Croatia, Czech Republic, Spain, Switzerland
  Biogeographic regions (According to curated Bioregion/Taxon lists):
    Nearctic, Neotropical, Palearctic

Distribution Notes:

This Ant is wildy spread across Virginia and can be found all over North America


Tuft of hair on gula present, situated behind head. Not present in Tetramorium tsushimae

Also this ant can be comonly mistaken as Tetramorium caespitum one big difference you can find is the size of the mandibles on Tetramorium immigrans they have smaller mandibles compared to their cousin Tetramourium caespitum 

Specimen Habitat Summary

Found most commonly in these habitats: 20 times found in on swimming pool surface, 12 times found in urban, 8 times found in shrub steppe, 2 times found in prairie near irrigation canal, 7 times found in city, 5 times found in roadside, 2 times found in backyard, 2 times found in in semi-damp exposed sandy soil, 1 times found in in wet clay, 1 times found in Pseudotauga Quercus forest, ...

Found most commonly in these microhabitats: 20 times under stone, 2 times nest in loose soil around prairie dog burrow, 3 times foragers, 5 times sidewalk, 2 times nest under stone, 1 times under exposed rock, 3 times strays, 4 times ground nest, 4 times on road, 4 times on ground, 2 times on flagstones, ...

Collected most commonly using these methods: 60 times search, 28 times hand collecting, 24 times Bay Area Ant Survey (BAAS), 8 times direct collection, 1 times mixed, 2 times cookie bait, 1 times Davis sifter, 1 times Hand, 1 times observation, 1 times pan trap, 1 times Winkler, ...

Elevations: collected from 1 - 2140 meters, 608 meters average

Collect Date Range: collected between 1965-08-15 and 2020-07-03

Type specimens: Lectotype of Tetramorium caespitum immigrans: casent0913997

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