Messor barbarus nigriceps Santschi, 1925 junior synonym of current valid taxon Messor barbarus (Linnaeus, 1767)
Messor barbarus var. nigriceps Santschi, 1925g: 341 (w.q.) SPAIN. Palearctic.
Primary type information: Type-material: syntype worker(s), syntype queen(s) (numbers not stated). Type-locality: Spain: Cáceres (Dusmet). Type-depository: NHMB.
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