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Palcephalopoda
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Palcephalopoda

cephalopod subclass

Learn about this topic in these articles:

classification

  • organizational levels and body diagrams of mollusks
    In mollusk: Annotated classification

    …8,100 m; 4 subclasses are Palcephalopoda (Orthoceroida; fossils); Nautiloida (fossil groups and 3–5 recent species); Ammonoida (fossils); and Coleoida (fossils and 4 recent orders). Many aspects of molluscan classification remain unsettled, particularly for gastropods and bivalves. The

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