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The larvae have been described as being brown on the upper side and a paler shade on the underside of the caterpillar. The adult male of this species was described as follows:

Adult male: Wingspan 20–22 mm. Very similar to A. titanica, with the following differences. Forewing with antemedian and postmedian lines slightly better defined than in titanica; postmedian line with indentation above median evagination and level with discal spot tending to be more pronounced than in titanica. Hindwing with dark antemedian line reaching much further across wing than in titanica (about half way to costa), and then diverting basad to join small variably distinct discal dot; terminal line present as dark brown fascia, with weakly scalloped inner margin; black dashes along termen absent. Forewing underside with postmedian line more distinct than in titanica and almost complete, reaching to near dorsum. …

This species inhabits short-lived wetlands on the Denniston Plateau and Mount Rochfort in the West Coast at altitudes of between 640 and 1000 m. Larvae of sister species in this genus feed on various species of native herbaceous plants. It has been hypothesised that the sole host of the larvae of this species is Liparophyllum gunnii, as females have been observed laying eggs on the underside of the leaves of this plant. An attempt was made to rear this species in captivity, with the larvae being feed on wilting leaves, stems and roots of this plant, but this was unsuccessful.

This species is a day flying moth. Adults have been observed on the wing in February and March.