Ascalenia acaciella is a moth in the family Cosmopterigidae. It is found on the Canary Islands and Malta,Fauna Europaea North Africa, the Near and Middle East and east to AfghanistanNotes on the Cosmopterigidae (Lepidoptera) of Afghanistan and Jammu & Kashmir, India with descriptions of two new species and Pakistan. The habitat consists of dry or desert-like areas.

The wingspan is .lepiforum.de

The larvae feed on the flower heads of Acacia species, including Acacia farnesiana, Acacia karroo and Acacia tortilis. Adults fly almost year-round, probably in several generations.

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