Sites:
| Classification of the Extant Echinodermata: Describes the taxonomic groupings and provides links to images of some taxa. | | Echinodermata: Characteristics and phylogeny of the spiny-skinned animals: sea urchins, starfish, and their allies. | | Echinoderms: Descriptions of the major species of Echinodermata (starfish, brittle star, sea urchin, feather star, sea cucumber) with illustrations and links to photos. | | Introduction to the Echinodermata: Overview of the systematics and ecology of starfish, brittle stars, sea cucumbers, sea urchins, and sand dollars. | | Phylum Echinodermata: Some characteristics of the phylum that includes starfish, sea cucumbers, sea urchins, crinoids and brittle stars. | | Sea and Sky: Echinoderms: A brief description of the phylum followed by a long list of annotated photographs. |
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Classical
