Myrtartona mariannae is a species of moth

Moth

A moth is an insect closely related to the butterfly, both being of the order Lepidoptera. Moths form the majority of this order; there are thought to be 150,000 to 250,000 different species of moth , with thousands of species yet to be described...

 in the Zygaenidae

Zygaenidae

The Zygaenidae moths are a family of Lepidoptera. The majority of zygaenids are tropical, but they are nevertheless quite well represented in temperate regions. There are about 1000 species. Various species are commonly known as Burnet or Forester moths, often qualified by the number of spots,...

 family. It is only known from Milmerran in south-eastern Queensland

Queensland

Queensland is a state of Australia, occupying the north-eastern section of the mainland continent. It is bordered by the Northern Territory, South Australia and New South Wales to the west, south-west and south respectively. To the east, Queensland is bordered by the Coral Sea and Pacific Ocean...

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The length of the forewings is 8.5 mm for males. The wings are elongate. The forewing is slender and somewhat triangular, while the hindwing is almost rectangular but rounded
Apically. The forewing upperside and underside are greyish brown. The hindwing is dark grey with a brownish tinge, but slightly paler medially.