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Sea Urchins

Somewhat flattened, globular echinoderms, having thin, brittle shells of calcareous plates. They are useful models for studying FERTILIZATION and EMBRYO DEVELOPMENT.

Year introduced: 1972

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Subheadings:

Tree Number(s): B01.050.500.408.578

MeSH Unique ID: D012617

Entry Terms:

  • Sea Urchin
  • Urchin, Sea
  • Urchins, Sea
  • Echinoidea
  • Echinoideas
  • Sand-Dollar
  • Sand Dollar
  • Sand-Dollars
  • Sand Dollars
  • Dollar, Sand
  • Dollars, Sand
  • Clypeasteroida
  • Clypeasteroidas

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