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  2. List of chordate orders - Wikipedia

    en.wikipedia.org/wiki/List_of_chordate_orders

    This article contains a list of all of the classes and orders that are located in the Phylum Chordata. The subphyla Tunicata and Vertebrata are in the unranked Olfactores clade, while the subphylum Cephalochordata is not. Animals in Olfactores are characterized as having a more advanced olfactory system than animals not in it.

  3. Category:Chordates - Wikipedia

    en.wikipedia.org/wiki/Category:Chordates

    Download as PDF; Printable version; In other projects ... (12 C, 2 P) Ι. Chordate ... Pages in category "Chordates" The following 5 pages are in this category, out ...

  4. Chordate - Wikipedia

    en.wikipedia.org/wiki/Chordate

    Hemichordates ("half chordates") have some features similar to those of chordates: branchial openings that open into the pharynx and look rather like gill slits; stomochords, similar in composition to notochords, but running in a circle round the "collar", which is ahead of the mouth; and a dorsal nerve cord—but also a smaller ventral nerve cord.

  5. Taxonomy of the vertebrates (Young, 1962) - Wikipedia

    en.wikipedia.org/wiki/Taxonomy_of_the...

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  6. Category:Chordates by geological period - Wikipedia

    en.wikipedia.org/wiki/Category:Chordates_by...

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  7. Category:Paleozoic chordates - Wikipedia

    en.wikipedia.org/wiki/Category:Paleozoic_chordates

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  8. Olfactores - Wikipedia

    en.wikipedia.org/wiki/Olfactores

    Olfactores represent the overwhelming majority of the phylum Chordata, as the Cephalochordata are the only chordates not included in the clade. This clade is defined by a more advanced olfactory system which, in the immediate vertebrate generation, gave rise to nostrils .

  9. Cambrian chordates - Wikipedia

    en.wikipedia.org/wiki/Cambrian_chordates

    The Cambrian chordates are an extinct group of animals belonging to the phylum Chordata that lived during the Cambrian, between 538 and 485 million years ago. The first Cambrian chordate known is Pikaia gracilens , a lancelet -like animal from the Burgess Shale in British Columbia , Canada.