Messor erwini Orou et al., 2023: 51, fig. 11, tables S1, 7 (s.w.) SPAIN. Palearctic.

Primary type information: Primary type material: holotype major worker. Primary type locality: Spain: Castellbell i el Vilar, 41.652909, 1.849238, open and heterogeneous shrubland, vi.2018, collection code #19603 (X. Arnan & R.G. Pol). Primary type depository: NHMW. Secondary type information: Secondary type material: 58 paratype major and minor workers. Secondary type locality: paratypes with same data as holotype but with collection codes #19595, #19597, #19598, #19600, #19601, #19602, #19603, #19604, #19639, #19640, #19641, #19642, #19643, #19645; paratypes with same data as holotype but vii.2018, collection codes #19596, #19599, #19644, #19646. Secondary type depositories: HNHM, MCNM, MNHN, NHMB, NHMW, SCPC.