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    Cephalopod - Wikipedia

    A cephalopod /ˈsɛfələpɒd/ is any member of the molluscan class Cephalopoda /sɛfəˈlɒpədə/ (Greek plural κεφαλόποδες, kephalópodes; "head-feet") such as a squid, octopus, cuttlefish, or nautilus. These exclusively marine animals are characterized by bilateral body symmetry, a prominent head, and … See more

    There are over 800 extant species of cephalopod, although new species continue to be described. An estimated 11,000 extinct taxa have been described, although the soft-bodied nature of cephalopods … See more

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    The traditional view of cephalopod evolution holds that they evolved in the Late Cambrian from a monoplacophoran-like ancestor with a curved, tapering shell, which was closely … See more

    Ancient seafaring people were aware of cephalopods, as evidenced by such artworks as a stone carving found in the archaeological … See more

    • Barskov, I. S.; Boiko, M. S.; Konovalova, V. A.; Leonova, T. B.; Nikolaeva, S. V. (2008). "Cephalopods in the marine ecosystems of the Paleozoic". Paleontological … See more

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  2. Cephalopod | Definition, Etymology, Species, & Facts

    WebApr 10, 2024 · Cephalopods are a class of mollusks with arms and tentacles, including octopus, squid, cuttlefish, and nautilus. Learn about their diversity, evolution, reproduction, and importance to humans from …

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    About 800 living species of cephalopods have been identified. Two important extinct taxa are the Ammonoidea (ammonites) and Belemnoidea (belemnites). Extant cephalopods range in size from the 10 mm (0.3 in) Idiosepius thailandicus to the 14 m (45.1 ft) colossal squid, the largest extant invertebrate .
    en.wikipedia.org
    The extinct cephalopods are the ammonites, belemnites, and nautiloids, except for five living species of Nautilus. The cephalopods agree with the rest of the Mollusca in basic structure, and the ancestors appear to have the closest affinity with the ancestors of the class Gastropoda.
    In this article, we will delve into cephalopod biology, evolution, anatomy, behavior, ecology, classification, and human interactions with these exceptional mollusks. Cephalopods belong to the phylum Mollusca, which includes snails, clams, and other soft-bodied invertebrates.
    (Erwin Poliakoff, Flickr) The cephalopods are a diverse class of mollusks (a group that also includes snails and bivalves) that emerged during an explosion of animal diversity in the oceans during the Cambrian period, over 500 million years ago (mya). Today, scientists divide the living cephalopods into three groups, called superorders.
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  5. Cephalopods | Smithsonian Ocean

  6. General features of cephalopods | Britannica

    WebLearn about cephalopods, the most active and largest living invertebrates, from Britannica's editors. Find out their general features, such as eyes, tentacles, skin colour, and swimming ability.

  7. Cephalopods: Facts about octopus, squid, nautilus and more

  8. ceph·alo·pod
    noun
    zoology
    1. an active predatory mollusc of the large class Cephalopoda, such as an octopus or squid.
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  12. ADW: Cephalopoda: INFORMATION