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The image
above shows a dorsal view of two molluscs commonly referred to as chitons
that belong to the Class Polyplacophora, a group that contains about 800
species. Chitons are common inhabitants of shallow, marine waters wherever
hard substrates are present. They have a flattened foot and convex
shell that is divided into eight articulating plates (valves). The plates
are embedded in a part of the mantle called the girdle, which is often
defended with spines or bristles. Chitons attach to rocky substrates with a
powerful suction created by their broad foot muscles, which allows them to
withstand strong waves and tidal currents. Most chitons feed on
attached algae with their radula. |
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