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Sea Urchin Embryo - http://www.its.caltech.edu/~mirsky/
A page from the Laboratory of Embryonic Gene Expression, included here for three beautiful photographs. |
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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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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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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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Strongylocentrotus purpuratus - http://digimorph.org/specimens/Strongylocentrotus_purpuratus/
Photograph and information on the purple sea urchin. |
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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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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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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. |
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Sea Urchin: A Stinging but Amazing Animal - http://www.microscopy-uk.org.uk/mag/artjul00/urchin1.html
Article by Jean-Marie Cavanihac on these animals with many photographs of their development. |
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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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Photos of Sea Urchins - http://www.starfish.ch/collection/seeigel.html
Photos of Echinoidea from the Indo-Pacific, with text about behavior, habitat, and characteristics. |
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Strongylocentrotus drobachiensis - http://webs.lander.edu/rsfox/invertebrates/strongylocentrotus.html
Exercise from Invertebrate Anatomy OnLine covering the systematics, external and internal anatomy of the green sea urchin. |
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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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Pencil Urchin: Ctenocidaris perrieri - http://www.peterbrueggeman.com/nsf/fguide/echinodermata20.html
Photographs and information on this urchin found in the icy waters of Antarctica. |
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Heart Urchin: Abatus sp. - http://www.peterbrueggeman.com/nsf/fguide/echinodermata5.html
Photographs and information on several species of heart urchin found in McMurdo Sound in Antarctica. |