Declared as unavailable (infrasubspecific) name: Bolton, 1995b: 170
[Note: Zettel et al., 2016: 136, 141, suggest that Diacamma rugosum ceylonense moicumForel, 1911f was made available by Santschi, 1932d: 14. But in Santschi’s text he merely mentions “la var. moicum”, which is interpreted here as an abbreviated writing of the full quadrinomial, not as a statement of change of taxonomic status.]