Mytilaster is a genus of marine mussels from the warmer waters of the Atlantic Ocean and Mediterranean Basin. The type species is Mytilaster lineatus.

Species Mytilaster lineatus (Gmelin, 1791) Mytilaster marioni (Locard, 1889) Mytilaster minimus (Poli, 1795) — dwarf mussel Mytilaster solidus Monterosato, 1884 ex H. Martin ms. Mytilaster solisianus (d'Orbigny, 1842)

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