Tommaso Di Maria Allery Monterosato

Tommaso di Maria Allery, marchese di Monterosato (27 June 1841 – 1 March 1927) was an Italian malacologist.

He became a distinguished scholar of the Mollusca in the Mediterranean, appreciated by students of malacology from around the world.

Despite his reluctance to research in the field, he collected a considerable amount of specimens to be studied in collaboration with other scholars.

During his many travels in Italy and abroad, he kept many contacts with famous malacologists.

He described many new species, enumerated the Mediterranean shells and studied the fossil deposits of Mount Pellegrino.