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Common name: Chordates
Name derivation: “having a spine”
Class Count: 14
Order Count: 147
Family Count: 1,157
Genus Count: 10,804
Species Count: 74,220
Earliest Fossil Record: Cambrian 539 mya
Habitat: Marine, Terrestrial Frehwater, Brackish
Size Range: 0.5 mm to 30 m
Notes: Based on Catalogue of Life as of March 2025