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12 Cards in this Set

  • Front
  • Back
Echinodermata
≈550 mya
Urochordata
≈540 mya
Cephalochordata
≈520 mya
Vertebrata
≈525 mya (may not be used in essay?)
Agnatha
490 mya
Placodermi
470 mya
Chondrichthyes
450 mya
Osteichthyes
450-425 mya
Amphibia
370 mya
Reptilia
300 mya
Aves
250 mya
Mammalia
300-200 mya