Elachista archaeonoma is a species of moth in the family Elachistidae. It was first described by Edward Meyrick in 1889. It is endemic to New Zealand.
This species was first described by Edward Meyrick in 1889 and named Elachista archaeonoma. In 1928 George Hudson discussed and illustrated this species in his 1928 book The butterflies and moths of New Zealand.
Hudson described this species as follows:
This species is endemic to New Zealand.
Adults have been recorded on wing in December and January.
The larvae of this species are grass leaf miners.