Trichostola is a genus of leaf beetles in the subfamily Eumolpinae. It is distributed on the Mascarene Islands. Some species placed in the genus have also been described from mainland Africa and Madagascar, but according to Jan Bechyné (1957) these actually belong to other genera. Additionally, some species described from Australia were placed in the genus by Julius Weise in 1923, but these are also considered to be misplaced.

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