Type species. Chiton cinereus Montagu, 1803, non Linnaeus, 1767 (= Chiton asellus Gmelin, 1791), by subsequent designation ( Gray 1847).
Distribution. This genus occurs worldwide ( Kaas & Van Belle 1985a). Leptochiton is one of the most ancient genera, with a putative and possibly questionable record in the Late Triassic of Italy [ L. davolii ( Laghi, 2005)].