Formica truncorum

Hymenoptera On-Line


Formica truncorum



Formica truncorum


Formica truncorum

Japanese Name


Original Reference

Fabricius, J.C. (1804) Systema Piezatorum: 439 pp. Brunsvigae.


Formica truncicola Nylander, 1846, Formica simulata Smith, F. 1878, Formica rufa var. truncicolopratensis Forel, 1874, Formica truncorum var. menozzii Stitz, 1939, Formica rufa var. rufotruncicola Ruzsky, 1896, Formica truncorum ab. stitzi Stitz, 1939,


Total length of workers 4.5 - 7 mm. Body color very similar to that of F. yessensis, but many workers are somewhat more yellowish. F. truncorum is distinguished from other species of Formica by the numerous erect setae on the extensor surfaces of its hind tibiae, and the presence of erect setae on the scapes. Erect, frequently long, setae are densely present all over the body.


Variation is observed in the abundance of erect hairs on the extensor surfaces of the hind tibiae and scapes. In Japan the known geographical range of F. truncorum is nearly separate from that of F. yessensis, but further distributional analysis is desirable. This species builds discrete nests in well insolated situations. Mounds are up to 1 m. in diameter and constructed from dead grass or conifer needles. According to Kupianskaja (pers. com.) there are differences in nest site preference and nesting habits between F. truncorum and F. yessensis in the Maritime Province of Siberia.


Northeastern parts of Hokkaido; Sakhalin, central parts of Eurasia and northwards.


  • Nylander, W. 1846. Adnotationes in monographiam formicarum borealium Europae. Acta Soc. Sci. Fenn., 2: 875-944.
  • Smith, F. 1878. Scientific results of the Second Yarkand Mission; based upon the collections and notes of the late Ferdinand Stoliczka, Ph.D. Hymenoptera. 22 pp. Superintendent of Government Printing (Government of India), Calcutta.
  • Forel, A. (1874). Les fourmis de la Suisse. Systematique. Notices anatomiques et physiologiques. Architecture. Distribution geographique. Nouvelles experiences et observations de moeurs. Neue Denkschriften der allgemeinen Schweizerischen Gesellschaft fur die gesammen Naturwissenschaften 26: 1-447.
  • Stitz, H., 1939. HautflŸger oder Hymenoptera. 1 Ameisen oder Formicidae. 428 pp. G. Fischer, Jena.
  • Ruzsky, M. 1896. Verzeichniss der Ameisen des šstlichen Russlands und des Uralgebirges. Berl. Entomol. Z., 41: 67-74.


Original text by Rikio Sonobe and Keiichi Onoyama. English translation by Keiichi Onoyama, edited by Robert W. Taylor. Revised by Masashi Yoshimura.