Crinoidea (2) Echinoidea (8) Holothuroidea (9) Stelleroidea (6) 1. Classification of the Extant Echinodermata - Describes the taxonomic groupings and provides links to images of some taxa. 2. Echinoderms - Descriptions of the major species of Echinodermata (starfish, brittle star, sea urchin, feather star, sea cucumber) with illustrations and links to photos. 3. Introduction to the Echinodermata - Overview of the systematics and ecology of starfish, brittle stars, sea cucumbers, sea urchins, and sand dollars. 4. Phylum Echinodermata - Some characteristics of the phylum that includes starfish, sea cucumbers, sea urchins, crinoids and brittle stars. 5. Sea and Sky: Echinoderms - A brief description of the phylum followed by a long list of annotated photographs. 6. Echinodermata - Characteristics and phylogeny of the spiny-skinned animals: sea urchins, starfish, and their allies.

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