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Species: Tapinoma sessile   (Say, 1836) 

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See Also:

Tapinoma sessile_nr

Taxonomic History (provided by Barry Bolton, 2021)

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

Taxonomic history

Combination in Tapinoma: Smith, 1858a PDF: 57
Senior synonym of Tapinoma parva, Tapinoma boreale Roger, 1863 (and its junior synonym Tapinoma boreale Provancher, 1887): Mayr, 1886d PDF: 434; Creighton, 1950a PDF: 353.
Senior synonym of Tapinoma dimmocki: Shattuck, 1992c PDF: 153.
// Distribution


  Geographic regions (According to curated Geolocale/Taxon lists):
    Americas: Canada, Mexico, United States
  Biogeographic regions (According to curated Bioregion/Taxon lists):
    Nearctic, Neotropical
  Native to (according to species list records):
    Nearctic bioregion

Distribution Notes:



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)

Scientific Name Status Publication Pages ModsID GoogleMaps
Tapinoma sessile   Ward, P. S., 2005, A synoptic review of the ants of California (Hymenoptera: Formicidae)., Zootaxa 936, pp. 1-68: -1, (download) -1 21008
Tapinoma sessile   Hamm, C. A., 2010, Multivariate discrimination and description of a new species of Tapinoma from the Western United States., Annals of the Entomological Society of America 103, pp. 20-29: 24-25, (download) 24-25 23125 GoogleMaps

Specimen Habitat Summary

Found most commonly in these habitats: 54 times found in Black Belt Prairie, 38 times found in cedar glade, 0 times found in in cultivated cotton, 0 times found in peripheral to cultivated cotton, 28 times found in oak woodland, 22 times found in deciduous forest, 23 times found in agricultural zone, 10 times found in on swimming pool surface, 22 times found in Ponderosa pine forest, 20 times found in oak/hickory forest near cedar glade, ...

Found most commonly in these microhabitats: 128 times under rock, 56 times under stone, 33 times litter, 14 times nest under stone, 15 times on low vegetation, 13 times log stage 4, 10 times ex sifted leaf litter, 6 times ex rotten log, 10 times strays, 6 times under dead wood, 1 times found under dry vegetation, ...

Collected most commonly using these methods: 121 times search, 52 times Bay Area Ant Survey (BAAS), 21 times pitfall trap, 63 times hand collecting, 64 times malaise trap, 38 times Berlese funnel, 24 times pitfall, 24 times Lindgren funnel, 18 times direct collection, 15 times sweeping, 7 times winkler, ...

Elevations: collected from 5 - 3202 meters, 1477 meters average

Collect Date Range: collected between 1897-09-27 and 2021-07-31

Type specimens: Lectotype of Tapinoma sessile: casent0172856, casent0172857; type of Tapinoma boreale: focol2872, focol2873

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