Class Amphineura

This class contains two very different kinds of mollusk. The subclass Polyplacophora contains about 600 species of sedentary animals commonly known as chitons, marine forms found from shallow waters to depths of about 1,300 ft (400 m). A chiton has a broad foot and a shell consisting of eight overlapping plates. The subclass Aplacophora contains about 100 species of wormlike, deepwater marine mollusks.

The Columbia Electronic Encyclopedia, 6th ed. Copyright © 2007, Columbia University Press. All rights reserved.

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