Echindoerms Sea Urchin Oral Surface Index Courses Zoo Review Echinoderms Urchin Oral Search

Image by: Bryan Yang; ~7x mangification

The oral surface of a preserved sea urchin.  Visible are the:

• spines - long structures that end in a blunt tip
• tube feet - short structures than end in a structure that looks a bit like a donut
• Aristotle's Lantern - the structure they use for chewing, includes their teeth
• peristome - membrane covering Aristotle's Lantern
• pedicellaria - little white dots scattered throughout the picture (almost look like salt grains), hard to see