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Species: Tapinoma sessile   (Say, 1836) 

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See Also:

Tapinoma sessile_cf

Taxonomic History (provided by Barry Bolton, 2015)

Formica sessilis Say, 1836 PDF: 287 (w.q.) U.S.A. Nearctic. AntCat AntWiki

Taxonomic history




Found in virtually all habitats, but most common in riparian, grassland and ruderal sites. Impermanent nests in preformed cavities and spaces.


Snelling list also recognizes a Tapinoma n. sp. From California.


The North American ants going by the name Tapinoma sessile are almost certainly a species complex, even with the exclusion of the following species.

Taxonomic Treatment (provided by Plazi)

Specimen Habitat Summary

Found most commonly in these habitats: 23 times found in agricultural zone, 14 times found in oak woodland, 7 times found in Ponderosa pine forest, 8 times found in shrub steppe, 2 times found in Meadow, 0 times found in Mixed canyon forest, 2 times found in Pinyon-cedar woodland, 6 times found in coastal scrub, 5 times found in Aspen forest, 2 times found in subalpine forest, ...

Collected most commonly using these methods or in the following microhabitats: 31 times Under rock, 79 times search, 52 times Bay Area Ant Survey (BAAS), 32 times hand collecting, 23 times pitfall, 3 times Log stage 4, 1 times Log stage 2, 6 times under wood, 0 times Log stage 3, 1 times Under boulder, 2 times Davis sifter, ...

Elevations: collected from 5 - 3202 meters, 1535 meters average

Type specimens: Lectotype: casent0172856, casent0172857

(-1 examples)

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