Classes of Mollusks: A comparative illustration of five mollusk classes—Polyplacophora, Monoplacophora, Scaphopoda, Gastropoda, and Cephalopoda—showing their anatomical features.
Diagram showing the five classes of mollusks: Polyplacophora (chiton), Monoplacophora (neopilina), Scaphopoda (tusk shell), Gastropoda (snail), and Cephalopoda (squid), with labeled body parts including head (H), foot (F), and mantle (A).