Myrtartona rufiventris is a species of moth in the family Zygaenidae. It is found in Western Australia, South Australia and Victoria.
The length of the forewings is 9- for males and 7.5- for females. The forewings are blackish brown with scattered whitish scales. The hindwings are elliptical, dark grey-brown, but paler proximally.
Adults have been reported exhibiting thanatosis when disturbed.
The larvae feed on Melaleuca lanceolata.