Timeline
2.6-50 MYA, evolution of humans and mammals diversity.
100 MYA, extinction of dinosaurs, first primates, first flowering plants.
150 MYA, first birds, dinosaurs diversity.
200 MYA, first mammals, first dinosaurs.
250 MYA, major extinctions, reptiles diversity.
300-350 MYA, first reptiles, scale trees, seed ferns
400 MYA, first amphibians, jawed fishes diversity
450 MYA, sudden diversification of metazoan families
500 MYA, first fishes, first chordates
550-650 MYA, first skeletal elements, first soft-bodied metazoans, first animal traces
-
