Mollusca: Class Aplacophora

The class Aplacophora contains about 300 species of wormlike, deepwater marine mollusks formerly classified with the sea cucumbers in Echinodermata. These mollusks lack shells and in many cases a foot as well. Generally small, they burrow in the upper layer of the sea bottom.

Sections in this article:

• Introduction
• Class Cephalopoda
• Class Scaphopoda
• Class Bivalvia
• Class Gastropoda
• Class Monoplacophora
• Class Polyplacophora
• Class Aplacophora
• Reproduction
• Circulatory and Nervous Systems
• Respiration
• The Digestive Tract
• The Shell
• The Body Wall
• Anatomical Features

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