Eupithecia petrohue is a moth in the family Geometridae. It is found in the Los Lagos Region (Llanquihue 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 8.5 mm for males. Adults have been recorded on wing in January.
Etymology The specific name is based on the type locality.
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