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Cies inside the genus Petrolisthes. The mixture of characters setting the genus Liopetrolisthes, including the sort species L. mitra, apart from the closely related Petrolisthes, Allopetrolisthes, and Clastotoechus, involves a carapace subovate and slightly longer than broad, a front trilobated and strongly developed beyond the eyes, a basal antennal segment lacking a strong anterior projection in