Tetramorium caespitum penninum Santschi, 1927 junior synonym of current valid taxon Tetramorium impurum (Foerster, 1850)
Tetramorium caespitum var. penninum Santschi, 1927b: 54 (w.) SWITZERLAND. Palearctic.
Primary type information: Primary type material: syntype workers (number not stated). Primary type locality: Switzerland: Zermatt (W.M. Wheeler). Primary type depository: NHMB.
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