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Echinodermata (80)
The phylum Echinodermata consists of about 7000 living species but there are a further 13,000 extinct species dating back to the Cambrian. They are basically pentaradially symmetric which means that they are five-sided, and all live in the sea. They include the sea lilies, the starfish, the sea daisies, the brittle stars, the sea urchins and the sea cucumbers.
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Sites
Classification of the Extant Echinodermata
· cached · Describes the taxonomic groupings and provides links to images of some taxa.
Phylum Echinodermata
· iweb · cached · Some characteristics of the phylum that includes starfish, sea cucumbers, sea urchins, crinoids and brittle stars.
Introduction to the Echinodermata
· cached · Overview of the systematics and ecology of starfish, brittle stars, sea cucumbers, sea urchins, and sand dollars.
Sea and Sky: Echinoderms
· iweb · cached · A brief description of the phylum followed by a long list of annotated photographs.
Echinoderms
· cached · Descriptions of the major species of Echinodermata (starfish, brittle star, sea urchin, feather star, sea cucumber) with illustrations and links to photos.
Echinodermata
· iweb · cached · Characteristics and phylogeny of the spiny-skinned animals: sea urchins, starfish, and their allies.
Gallery of Echinoderm Larvae
· cached · A collection of photographs of developing starfish and sea urchins with information about each.
The Echinoid Directory
· Project based at the Natural History Museum, London, aiming to provide information for amateurs and the scientific community on this major group of marine invertebrates with a long fossil record.
Galaxy of Images: Starfish, Sea Lilies and Other Ecinoderms
· cached · Provides images from the printed books and manuscripts in the collections of the Smithsonian Institution Libraries.
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