Arctornis jonasii is a moth in the family Erebidae, originally placed in its own genus, Topomesoides, which was synonymized with Arctornis in 2015.Wang, H. et al. (2015) Molecular phylogeny of Lymantriinae (Lepidoptera, Noctuoidea, Erebidae) inferred from eight gene regions. Cladistics 31(6):579-592 DOI: 10.1111/cla.12108 It was first described by Arthur Gardiner Butler in 1877.
It is found in Japan and Korea. The larva feeds on Pourthiaea villosa and Sambucus sieboldiana.
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