Diacamma rugosum geminatum Emery, 1897 junior synonym of current valid taxon Diacamma rugosum (Le Guillou, 1842)
Diacamma rugosum subsp. geminatum Emery, 1897h: 161, figs. 6, 12 (w.) INDONESIA (Halmahera). Australasia.
Primary type information: Primary type material: syntype workers (number not stated). Primary type locality: Indonesia: Halmahera (O. Beccari). Primary type depository: MSNG.
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