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Sea Urchin Embryology - http://www.stanford.edu/group/Urchin/
Laboratory modules using sea urchin eggs to explore fertilization and development. |
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Strongylocentrotus purpuratus - http://digimorph.org/specimens/Strongylocentrotus_purpuratus/
Photograph and information on the purple sea urchin. |
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The Echinoids - http://www.nhm.ac.uk/palaeontology/echinoids/
Information about sea urchins, such as how they live, feed, and reproduce. There is also an alphabetic listing of their taxa. From The Natural History Museum, London. |
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Red Sea Urchin - http://en.wikipedia.org/wiki/Red_sea_urchin
Information from Wikipedia on this species, Strongylocentrotus franciscanus, including its description, feeding habits, behavior and reproduction. |
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Sterechinus neumayeri - http://www.peterbrueggeman.com/nsf/fguide/echinodermata1.html
Photographs and information on this urchin found in Antarctica which often camouflages itself with bits of shell and debris. |
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Loxechinus albus - http://www.fao.org/fi/website/FIRetrieveAction.do?dom=species&fid=3621
Factsheet from the FAO on the Chilean Sea Urchin which is eaten in Chile and Peru, its distinguishing features, distribution, habitat and biology. |
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Echinoid Directory - http://www.nhm.ac.uk/research-curation/projects/echinoid-directory/intro/introduction.html
Biology, phylogeny, and classification of sea urchins. |
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Calcareous Flowers: Tests and Cross-sections of Sea Urchin Spines. - http://www.microscopy-uk.org.uk/mag/artaug05/rh-seaurchin.html
Photographic study by Richard Howey with some fine photographs of the intricate beauty of these structures. |
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Sea Urchins Revisited - http://www.microscopy-uk.org.uk/mag/artmay02/urchin2.html
Photographic study by Jean-Marie Cavanihac of the sea urchin with some microscopic features of interest to the amateur naturalist. |
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Who is in Charge Here? - http://www.microscopy-uk.org.uk/mag/artdec02/rhcharge.html
Illustrated article by Richard L. Howey considering how creatures with no brains, such as the sea urchin, react appropriately to their surroundings. |