pallial line
mollusk anatomy
Quick Summary
The pallial line is a mark on the inner surface of a bivalve shell, running parallel to the shell's edge. This line is created by the attachment of the mantle, a soft tissue that secretes the shell. In some bivalves, there's a noticeable inward bend in the posterior part of the pallial line, known as the pallial sinus. The mantle itself is a key external feature of mollusks, a diverse group of invertebrates that typically have a shell.1234
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