Palaeosia is a monotypic genus of moths in the family Erebidae erected by George Hampson in 1900. Its only species, Palaeosia bicosta, the two-ribbed arctiid or two-ribbed footman, was first described by Francis Walker in 1854. It is found in south-eastern Australia.
The wingspan is about 30 mm.
The larvae feed on lichen.
Former species Palaeosia longistriga, now Oeonosia longistriga (Bethune-Baker, 1908)
References