Pseudidonauton vexa is a species of moth of the family Limacodidae. It is found in northern and central Vietnam and south-eastern Thailand at altitudes between 280 and 380 meters.
The length of the forewings is 6–7 mm for males and about 9 mm for females. Adults have been recorded in early August and from late September to early October.
Etymology The species name is derived from Latin vexo (meaning "disarrange").
References Alexey Solovyev (2009): Notes on South-East Asian Limacodidae (Lepidoptera, Zygaenoidea) with one new genus and eleven new species. Tijdschrift voor Entomologie 152: 167–183
External links The Barcode of Life Data Systems (BOLD)