Figure 5.

Divergence times of Hexacorallia corals at family level based on their mitogenomes. The divergence time points of the 49 families within Hexacorallia were calculated based on 13 PCGs of the mitogenome. Each species represents one family. The three red circles represent the fossil times used to calibrate the molecular clock. The columns below the tree are the geologic ages. Eon: Phanerozoic; eras: Paleozoic Era, Mesozoic Era, and Cenozoic Era; periods: O (Ordovician Period), S (Silurian Period), D (Devonian Period), MIS (Mississippian Period), Pen (Pennsylvanian Period), P (Permian Period), Tr (Triassic Period), J (Jurassic Period), Cretaceous Period, Pg (Paleogene Period), and Ng (Neogene Period). The mitogenomes were listed in Supplementary Table S2.