Sphenophorus brunnipennis (common name - La Plata weevil) is a beetle in the Dryophthoridae family.

It was first described by Ernst Friedrich Germar in 1824 as Calandra brunnipennis. He describes it as living in Buenos Aires.

Sphenophorus brunipennis arrived in Australia from South America, and was found to have been established in Perth and Brisbane by the 1920s, and it appears to be spreading. It has also been introduced into New Zealand.

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