Eupithecia osornoensis is a moth in the family Geometridae. It is found in the Region of Los Lagos (coastal Osomo Province) in Chile., 1987, The Eupithecia (Lepidoptera, Geometridae) of Chile. Bulletin of the American Museum of Natural History 186 (3): 269-363. The habitat consists of the Valdivian Forest Biotic Province.
The length of the forewings is about 9 mm for males and 8 mm for females. Adults have been recorded on wing in February.
Etymology The specific name is derived from the type locality.
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