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550 mya: Agnatha (jawless vertebrates): Myxini (hagfishes) and Petromyzontida (lampreys) |
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439 mya: Gnathostomata (jawed vertebrates): |
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439 mya: Chondrichthyes (cartilaginous fishes): sharks, rays, and chimaeras |
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425 mya: Osteichthyes (bony fish): |
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425 mya: Actinopterygii (ray-finned fish) constitutes nearly 99% of over 30,000 living species of fish |
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425 mya: Sarcopterygii (lobe-finned 'fish'): coelacanths, lungfish and Tetrapoda: |
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380 mya: Tetrapoda (four-limbed vertebrates): |
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380 mya: Amphibia: frogs, salamanders and caecilians |
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315 mya: Sauria (or reptiles in general): |
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250 mya: Lepidosauromorpha: tuatara, lizards, snakes |
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250 mya: Archelosauria: turtles, crocodilians, dinosaurs (birds: 100 mya) |
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225 mya: Mammalia |
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red: warm-blooded