PALEOZOICO |
MESOZOICO |
CENOZOICO |
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ESPECIES |
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jjjjjjjjjjjjjjjj | TRILOBITES |
ANOMALOCARIS |
DUNKLEOSTEUS |
MEGANEURA |
DIMETRODON |
HERRERASAURUS | PLESIOSAURUS |
PTERANODON |
MESONYX |
ORIGEN DE LOS HOMÍNIDOS