Tapinoma pygmaeum (Dufour, 1857) (Hymenoptera, Formicidae), not a rare species

Tapinoma pygmaeum is an ant known from seven localities. Five of them are in the province of Girona (Spain). The apparent rarity and skewed distribution of this species is probably an artifact due to the confussion, in field samplings, with a similar species Plagiolepis pygmaea ​
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