• Emery, 1925a: 184 (q.); Kutter, 1977c: 151 (m.).
• Combination in Tetramorium: Mayr, 1855: 426.
• Junior synonym of Tetramorium caespitum: Curtis, 1854: 215; Mayr, 1855: 426.
• Status as species: Kutter, 1977c: 159; Pasteels et al., 1981: 675; Cammaerts et al., 1985: 109; Radchenko et al., 1998: 109.
• Senior synonym of Tetramorium impurum gregori: Wagner et al., 2017: 120.
• Senior synonym of Tetramorium caespitum penninum: Sanetra et al., 1999: 321; Wagner et al., 2017: 120.

Junior synonyms

• Tetramorium caespitum penninum Santschi, 1927
• Tetramorium impurum gregori Kratochvíl et al., 1944

Obsolete combinations

• Myrmica impura

Citations

• Cammaerts, R.; Pasteels, J. M.; Roisin, Y. 1985. Identification et distribution de Tetramorium caespitum (L.) et T. impurum (Foerster) en Belgique (Hymenoptera Formicidae). Actes des Colloques Insectes Sociaux 2:109-118.
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• Curtis, J. 1854. On the genus Myrmica and other indigenous ants. Transactions of the Linnean Society of London 21:211-220.
  123987
• Emery, C. 1925a ("1924"). Notes critiques de myrmécologie. Annales de la Société Entomologique de Belgique 64:177-191. PDF
  124772
• Foerster, A. 1850a. Hymenopterologische Studien. 1. Formicariae. Aachen: Ernst Ter Meer, 74 pp.
  124947
• Kutter, H. 1977c. Hymenoptera, Formicidae. Insecta Helvetica. Fauna 6:1-298.
  126740
• Mayr, G. 1855. Formicina austriaca. Beschreibung der bisher im österreichischen Kaiserstaate aufgefundenen Ameisen, nebst Hinzufügung jener in Deutschland, in der Schweiz und in Italien vorkommenden Arten. Verhandlungen der Zoologisch-Botanischen Vereins in Wien 5:273-478. PDF
  127185
• Pasteels, J. M.; Verhaeghe, J. C.; Ottinger, R.; Braekman, J.C.; Daloze, D. 1981. Absolute configuration of (3R,4S)-4-methyl-3-hexanol - a pheromone from the head of the ant Tetramorium impurum Foerster. Insect Biochemistry 11:675-678. PDF
  127727
• Radchenko, A. G.; Czechowski, W.; Czechowska, W. 1998. The genus Tetramorium Mayr (Hymenoptera, Formicidae) in Poland - a survey of species and a key for their identification. Annales Zoologici (Warsaw) 48:107-118.
  132084
• Sanetra, M.; Güsten, R.; Schulz, A. 1999. On the taxonomy and distribution of Italian Tetramorium species and their social parasites (Hymenoptera Formicidae). Memorie della Società Entomologica Italiana 77:317-357. PDF
  132198
• Wagner, H. C.; Arthofer, W.; Seifert, B.; Muster, C.; Steiner, F. M.; Schlick-Steiner, B. C. 2017. Light at the end of the tunnel: Integrative taxonomy delimits cryptic species in the Tetramorium caespitum complex (Hymenoptera: Formicidae). Myrmecological News 25:95-129. PDF
  143118