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Species: Stigmatomma oregonense   Wheeler, 1915 

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Taxonomic History (provided by Barry Bolton, 2022)

Stigmatomma pallipes subsp. oregonense Wheeler, 1915b PDF: 389 (w.q.) U.S.A. (Oregon, Washington). Nearctic. Primary type information: Type-material: 13 syntype workers, 4 syntype queens. Type-localities: U.S.A.: Oregon, Marion (P.J. Schmitt), U.S.A.: Washington, Olympia (T. Kincaid). Type-depositories: AMNH, MCZC. AntCat AntWiki HOL

Taxonomic history

[Stigmatomma pallipes subsp. oregonense Wheeler, 1910a PDF: 561. Nomen nudum.]
Combination in Amblyopone: Brown, 1960a: 169.
Status as species: Brown, 1960a: 169, 183, 192 (in key); Smith, 1967a PDF: 346; Smith, 1979: 1335; Wheeler & Wheeler, 1986g PDF: 17 (in key); Ward, 1988 PDF: 105; Lattke, 1991d PDF: 6 (in key); Bolton, 1995b: 62; Lacau & Delabie, 2002 PDF: 40 (in key); Ward, 2005 PDF: 25.
// Distribution


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

Distribution Notes:

Sierra Nevada and northwestern California. Outside California: Oregon to British Columbia.


Amblyopone oregonensis is found in shaded, mixed coniferous forest, where it nests in large rotten logs. Colonies are polygynous and often rather diffusely distributed throughout the log. The principal prey appears to be geophilomorph centipedes. Alates emerge in August and September.


Worker: inner border of mandible straight; anterior clypeal margin straight; large species (HW 1.21-1.40), with broad head (CI 0.94-1.01).


Ward (1988).

Specimen Habitat Summary

Found most commonly in these habitats: 7 times found in mixed coniferous forest, 1 times found in mixed conifer/hardwood, 1 times found in mixed conifer forest, 1 times found in Quercus-Pinus-Pseudotsuga, 1 times found in lichen bald, conifer forest edge, 1 times found in lichen-covered bluff.

Found most commonly in these microhabitats: 5 times ex rotten log, 3 times sifted litter (leaf mold, rotten wood), 1 times under bark of Pseudotsuga menziesii, 1 times under stone, 1 times in dead wood, 1 times ex large rotten log (Pseudotsuga).

Collected most commonly using these methods: 3 times direct collection, 1 times hand collecting, 2 times search, 1 times 6L sifted litter, extracted in Winkler sack over 96 hours, 1 times leaf litter sifted with Davis sifter.

Elevations: collected from 30 - 1470 meters, 1024 meters average

Collect Date Range: collected between 1949-01-01 00:00:00.0 and 2020-11-01 00:00:00.0

Type specimens: type of Stigmatomma oregonense: casent0103326, casent0172805, casent0172806

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