Chordata, a phylum in the Kingdom Animalia, is populated by animals that, at some stage, develop a hollow dorsal nerve cord, pharyngeal slits, and a muscular tail extending past the anus.
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Animal Diversity Web Phylum Chordata
Presents the differentiating characteristics of the members of the phylum.
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Animal Genome Size Database: Chordates
Details information on members of the phylum that do not have a spinal cord.
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Biology of Chordates
Previews the video showing vertebrate evolution from BioMedia Associates. With images and ordering information.
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Characteristics of Chordates
Lists the unique features of members of the phylum that it shares with what is believed to be its ancestors.
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Chordate
Features the unique characteristics of the members of the phylum. With links to classes and subgroups.
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Chordates
Relates phylum characteristics and information on subphyla.
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Chordates From Tunicates to Humans
Describes the common features of the members of the phylum as well as its major divisions. With links to subgroups.
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Encyclopedia.com: Chordata
Offers definitions, related topics, newspaper and magazine articles, and videos.
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Introduction to the Chordata
Offers information on the phylum that includes humans and all the vertebrates. Includes distinguishing features.
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Introduction to the Vertebrates
Presents the unique characteristics of the animals with backbones. With links to related sites.
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Paleontology Portal: Hemichordates and Chordates
Contains characteristics, earliest fossil occurrence, and access to images of fossil specimens from various eras.
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Phanerozoic Aeon 570 MYA-Present Development of Chordates Up to the Vertebrates
Presents a discussion on animal evolution throughout the eleven periods in this particular eon.
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Reptiles and Amphibians
Lists web sites with short descriptions. With photos.
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Reptiles and Amphibians
Shows pictures and links.
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Reptiles and Amphibians in French
Shows pictures and links.
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Ryan Photographic Chordates
Provides access to a collection of images of members of the phylum.
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Shape of Life Phylum Chordata
Provides information on the group that includes the birds, mammals, reptiles, amphibians and fishes. With links to related sites.
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Smithsonian National Zoological Park Reptiles and Amphibians
Discusses member species and population. With pictures, links and related events.
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South Carolina Reptiles and Amphibians
Provides pictures and links to species in other areas of the globe.
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Tree of Life Chordata
Describes the group that includes the mammals, fishes, amphibians, reptiles and birds.
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Will's Skull Page
Offers access to images of skulls from mammals, reptiles and birds. With descriptions and measurements.
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Zoobotanica Chordates
Offers scientific illustrations of members of the phylum.