Fig. 2: Phanerozoic oceans sequentially harbored four global benthic mega-assemblages.
From: A multiscale view of the Phanerozoic fossil record reveals the three major biotic transitions
The per stage significance measures the probability of retrieving a given mega-assemblage across 100 bootstrapped solutions and captures the global instability of the modular structure in the assembled network after the end-Permian49 and subsequent Late Triassic and Early Jurassic extinction events42. Mega-assemblage shifts occur at the following boundaries: End-Cambrian (combined Paibian/Jiangshanian to Age10), end-Permian (Changhsingian to Induan), and mid-Cretaceous (Hauterivian to Barremian). Cm Cambrian, Pz Paleozoic, Tr-lKr Triassic to lower Cretaceous, mKr-Q mid-Cretaceous to Quaternary.
