White Hammer Oyster (Malleus albus) - ROM2004_861_7

White hammer oyster, Malleus albus

White Hammer Oyster (Malleus albus)

Geography: Indo-Pacific
length=15.0; height=13.0 cm
    • Attributes
    • Objects
    • Taxonomy
    • KingdomAnimalia
    • PhylumMollusca
    • ClassBivalvia
    • OrderPterioida
    • FamilyMalleidae
    • GenusMalleus
    • SpecificEpithetalbus
Object number: ROMIZ M12439
Not on view
DescriptionAppropriately named, the closed valves of this species resemble a hammer. Its shell is white, although it may be spotted in juveniles. The valves are hinged at the top of the “T” with the hinge being held by a large oblique ligament rather than teeth. The hammer-like expansions of the hinge serve to steady the shell and prevent it from being turned over. The interior of the shell is partially nacreous or iridescent. This species may reach 20 cm in length. Malleus albus is a filter feeder found in Indo Pacific waters. It is common and encountered in shallow water on grass and rock flats.
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