Fig. 2.

Unipartite network of Ediacaran macrofossil genera. a Network graph. Two genera are linked if those taxa cooccur at any fossil collection point in the dataset. Colors indicate modules identified using the COPRA community-detection algorithm (v = 5). According to randomization testing, this community structure is statistically significant (Supplementary Fig. 9; Q = 0.82, P < 0.01, Z = 7.700). All genera fall into four modules: the Avalon (blue), White Sea (green), Miaohe (orange), and Nama (red) clusters (Fig. 1; Supplementary Figs. 2–4). b Venn diagram illustrating module overlap. Areas of circles correspond to their relative numbers of genera, numbers are counts of taxa, and values in parentheses are proportions. c, d Stacked bar graphs showing numbers of genera in the modules and their preservational modes (c) and morphogroups (d). Source data are provided as a Source Data file