Tetramorium caespitum penninum

This taxon is not in use as it is currently considered to be a junior synonym of Tetramorium impurum.

Nomenclature

 * penninum. Tetramorium caespitum var. penninum Santschi, 1927a: 54 (w.) SWITZERLAND.
 * Subspecies of caespitum: Novák & Sadil, 1941: 87 (in key); Bolton, 1995b: 412.
 * Junior synonym of impurum: Sanetra, et al. 1999: 321.