Perhaps the most important fossils from Chengjiang are eight possible members of phylum Chordata, the phylum to which all vertebrates belong.
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One challenge studying sleep evolution is that adequate sleep information is known only for two phyla of animals-chordata and arthropoda.
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After a short section on Chordata and non-fish taxa, the work lists all known fish families in a systematic fashion.
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Human beings, for example, fall under the phylum Chordata, which includes all vertebrates, warm-and cold-blooded alike.
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There is still much ongoing differential ( DNA sequence based ) comparison research that is trying to separate out the simplest forms of Chordata.
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This article focuses on the segmentation of animal body plans, specifically using the examples of the taxa Arthropoda, Chordata, and Annelida.
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For example, dogs are usually assigned to the phylum Chordata ( animals with notochords ); in the class Mammalia; in the order Carnivora.
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The majority of animals use arginine as phosphagen; however, the phylum Chordata ( i . e ., animals with spinal cords ) use creatine.
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""'Turritella chordata " "'is a species of sea snail, a marine gastropod mollusk in the family Turritellidae.
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If the interpretation is correct, this would be one of the first members of the phylum Chordata _ the branch of the animal kingdom that includes us vertebrates.