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Species: Aphaenogaster rudis   Enzmann, 1947 

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See Also:

Aphaenogaster rudis_cf

Taxonomic History (provided by Barry Bolton, 2018)

Aphaenogaster fulva var. rudis Enzmann, 1947b PDF: 150 (w.q.) U.S.A. Nearctic. AntCat AntWiki HOL

Taxonomic history

[First available use of Stenamma fulvum aquia rude Emery, 1895d PDF: 305; unavailable name.].
Wheeler, G.
C & Wheeler, J. 1953b: 56 (l.); Crozier, 1970a PDF: 125 (k.).
Raised to species: Creighton, 1950a PDF: 147.
Subspecies of Aphaenogaster picea as this name made available first (Aphaenogaster picea entered as subspecies of Aphaenogaster rudis in Creighton, 1950a PDF: 147), and hence is senior name: Bolton, 1995b: 72.
Raised to species: Umphrey, 1996 PDF: 558 (in key).


  Geographic regions (According to curated Geolocale/Taxon lists):
    Americas: Canada, United States
  Biogeographic regions (According to curated Bioregion/Taxon lists):

Distribution Notes:



Habitat: A. rudis is locally common to very abundant in thickets, remnant and mature second-growth, mesic woodlands and forest. It also nests in prairie oak groves and occasionally extends into prairie areas where populations of this ant abound in adjacent woodland. A. rudis may occur in large urban parks, campuses and cemeteries with groves of shrubs or. It nests in soil, in the root-zone of bunch-forming sedges and grasses, beneath rocks and in decomposed wood, even in old cans and other trash discarded in the woods. It commonly nests inside wood fallen wood that is in the mid to latter stages of decomposition and in the duff between large vines and the base of supporting trees.

Natural History: See account for A. fulva -- I am unable to say any thing that clearly distinguishes this ant from A. fulva behaviorally, but ecologically, it may be more restricted to mesic sites.

Specimen Habitat Summary

Found most commonly in these habitats: 0 times found in under bark & decaying wood, 11 times found in on sand dunes, 10 times found in Beech-maple forest, 6 times found in mixed hardwood forest, 5 times found in mixed deciduous forest, 4 times found in pasture, 1 times found in riparian mixed hardwood forest, 0 times found in rest area, 2 times found in Basswood-maple forest, 2 times found in beech maple forest, ...

Found most commonly in these microhabitats: 12 times under rock, 8 times log stage 4, 7 times log stage 5, 1 times nests under bark of dead and down tree, 3 times under wood, 3 times log stage 3, 2 times ground foragers, 2 times under stone, 2 times rotting log, 1 times leaf mold, 1 times in root of Tulip tree, ...

Collected most commonly using these methods: 11 times general collecting, 1 times hand collecting, 4 times pitfall trap, 3 times direct collection, 2 times search, 1 times Berlese, 1 times hand collected.

Elevations: collected from 15 - 2134 meters, 584 meters average

Type specimens:

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