Diacamma rugosum arcuatum Karavaiev, 1925 valid
Diacamma rugosum subsp. arcuata Karavaiev, 1925b: 118 (w.) INDONESIA (Sumatra). Indomalaya.
Primary type information: Type-material: holotype worker. Type-locality: Indonesia: Sumatra, Manguinang, 25.xi.1913 (O. John). Type-depository: SIZK.
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