Janaesia antarctica is a moth of the family Noctuidae. It is found in Punta Arenas in Chile and Tierra del Fuego in Argentina.

Janaesia antarctica
Scientific classification
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J. antarctica
Binomial name
Janaesia antarctica
(Staudinger, 1899)
Synonyms
  • Leucania antarctica Staudinger, 1899
  • Paranicla hyadesi Köhler, 1959

The wingspan is 28–38 mm. Adults are on wing from December to February.

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