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Species: Liometopum luctuosum   Wheeler, 1905 

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Taxonomic History (provided by Barry Bolton, 2020)

Liometopum apiculatum subsp. luctuosum Wheeler, 1905h PDF: 325 (w.) U.S.A. Nearctic. AntCat AntWiki HOL

Taxonomic history

Raised to species: Wheeler & Wheeler, 1986g PDF: 55; MacKay et al., 1988: 102.

Taxon Page Images:

Friend or Foe? Two workers of the tree ant Liometopum luctuosum check each other out. Mojave National Preserve, California, USA.
Image © Alex Wild.


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

Distribution Notes:

collected from the Chiricahua Mtns, Cochise Co.


Typically associated with conifers, particularly pines (Pinus spp.).


In the North American fauna, this uniformly brownish species is formally recognized by the sparse (as opposed to abundant) pilosity (hairiness); the hairs on the gaster are few or absent, and those on the mesosoma are mostly confined to the pronotum. Overall they have a very shiny appearance compared to the velvety look of other Nearctic species.

Taxonomic Treatment (provided by Plazi)

Specimen Habitat Summary

Found most commonly in these habitats: 8 times found in Pinyon-cedar-oak woodland, 1 times found in desert, 6 times found in oak woodland, 6 times found in riparian woodland, 2 times found in desert scrub, 5 times found in chaparral, 4 times found in ponderosa pine forest, 3 times found in fir-pine-oak forest, 4 times found in Pinyon-cedar woodland, 2 times found in riparian forest, ...

Found most commonly in these microhabitats: 12 times ground forager(s), 9 times on tree trunk, 7 times under rock, 6 times sifted litter (leaf mold, rotten wood), 4 times under stone, 1 times nest in Pinus ponderosa log, 1 times in base of Pinus ponderosa, 1 times foragers on Populus, 2 times on Arctostaphylos, 1 times on Abies trunk, 1 times nocturnal foragers on cottonwood, ...

Collected most commonly using these methods: 17 times search, 11 times hand collecting, 3 times at light, 2 times Winkler sifter, 1 times direct collection, 2 times hand collected, 1 times Mercury Vapor Lamp, 1 times pitfall, 1 times 6L sifted litter, extracted in Winkler sack over 48 hours, 1 times pitfall trap, 00-10 times at uv light, 9, ...

Elevations: collected from 5 - 2850 meters, 1383 meters average

Collect Date Range: collected between 1927-06-04 and 2019-07-13

Type specimens: Type - uncertain status: fmnhins0000091117

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