Michaelophorus dentiger is a species of moth in the genus Michaelophorus, known from Argentina, Brazil, British Guyana, Cuba, Curaçao, Honduras, Ecuador, Nicaragua, Paraguay, and Venezuela. The hostplant for the species is suspected to be Hippomane mancinella. Moths in this species are in flight all year round, and have a wingspan of approximately 13–15 millimetres (0.51–0.59 in).