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Common names:
Name derivation: “hedgehog skin”
Number of Orders: 53
Number of Families: 337
Number of Genus: 2,410
Number of known Species: 11,726
Earliest Fossil Record: Early Cambrian 538 - 521 mya
Habitat: Marine
Size Range: 1.5 mm to 70 cm
Notes: Based on Catalogue of Life as of July 2024