Barbatia amygdalumtostum, the almond ark or burnt-almond ark, is a species of bearded ark clams in the family Arcidae. It was described by Peter Friedrich Röding in 1798. Barbatia amygdalumtostum is found in the littoral and sublittoral of Indian and western Pacific Oceans. It is also known from the Miocene of Japan.
Barbatia amygdalumtostum can grow to shell length.
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