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Species: Formica truncorum   Fabricius, 1804 

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See Also:

Formica truncorum finzii

Taxonomic History (provided by Barry Bolton, 2020)

Extant: 1 valid subspecies

Formica truncorum Fabricius, 1804 PDF: 403 (q.) CZECHOSLOVAKIA. Palearctic. AntCat AntWiki HOL

Taxonomic history

Senior synonym of Formica menozzii, Formica rufotruncicola, Formica staegeri and material of the unavailable name Formica stitzi referred here: Dlussky, 1967a PDF: 81.
Current subspecies: nominal plus F. t. finzii.
// Distribution


  Geographic regions (According to curated Geolocale/Taxon lists):
    Americas: United States
    Asia: China
    Europe: Belgium, Czech Republic, Denmark, Finland, Germany, Italy, Norway, Poland, Russia, Slovenia, Sweden, Switzerland
  Biogeographic regions (According to curated Bioregion/Taxon lists):
    Nearctic, Palearctic

Taxonomic Treatment (provided by Plazi)

Treatment Citation: Collingwood, C. A., 1979, The Formicidae (Hymenoptera) of Fennoscandia and Denmark., Fauna Entomologica Scandinavica 8, pp. 1-174

57. Formica truncorum FabriciusHNS, 1804 Figs. 224-228.

Formica truncorum FabriciusHNS, 1804:403.

Worker. Large workers with head, alitrunk and base of first gaster tergite bright yellowish red, gaster greyish brown covered with long pubescence; smaller workers are usually darker but never with clearly marked black patches as in F. pratensisHNS. Eyes, occiput, genae, gula, scapes and tibiae as well as whole body covered in short erect hairs. Frons with large shallow punctures; frontal triangle shining without punctures or sculpture. Funiculus in larger workers slender with segments two and three twice as long as wide. Lateral clypeal pits deep and rounded. Length: 3.5-9.0 mm.

Queen. Brightly coloured with head and most of alitrunk red or with part of ocellar region and most of scutum brownish. Pilosity and other features as in worker. Length: 8.0-9.5 mm.

Male. Black with appendages and external genitalia entirely yellowish. All surfaces covered with short erect hairs. Punctures coarse and shallow on head and alitrunk; frontal triangle shining without sculpture. Mandibles with three or four teeth. Length: 7.0-9.0 mm.

Figs. 224-227. Formica truncorum FabrHNS. - 224: worker in profile; 225: head of worker in dorsal view; 226: head of queen in dorsal view; 227: head of male in dorsal view. Scale: 1 mm.

Distribution. Locally common throughout Denmark and Fennoscandia, not found in British Isles. - Range: Jura Alps to North Japan, Italy to North Norway.

Biology. This species has large spreading colonies among stones or in tree stumps with loose surface leaf litter sometimes built into a shallow loose mound. This is an aggressive acid squirting species found at the borders of woodland and in stony banks and often particularly abundant on offshore islands. F. truncorumHNS is normally polygynous, sometimes with many small dark headed queens. New colonies may be formed by nest splitting or by the adoption of single large red headed queens by F. fuscaHNS and allied species. Males and queens occur in July and August, latter than with most members of the F. rufaHNS group.

Specimen Habitat Summary

Found most commonly in these habitats: 1 times found in Subalpine, rocks and pine trees, 1 times found in Unknown, 1 times found in xerothermous open grassland, sand, 1 times found in beach, sanddunes, 1 times found in open stony lake shore.

Found most commonly in these microhabitats: 1 times ground, 1 times foraging on the ground, 1 times foraging on sand, 1 times foraging.

Collected most commonly using these methods: 4 times search.

Elevations: collected from 1550 - 1750 meters, 1650 meters average

Collect Date Range: collected between 1953-08-04 and 2018-10-18

Type specimens: syntype of Formica rufa truncicolopratensis: casent0911086

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