Figure 2. A in Sea-land transition drove terrestrial amphipod diversification in East Asia, with a description of a new species

Figure 2. A, time-calibrated tree obtained from BEAST 2 based on concatenated loci. The divergence times and 95% highest posterior density are showed at nodes of interest. The sea–land transition occurred about 15.63 Mya, corresponding with the divergence between coastal Platoechestia pacifica and terrestrial Morinoia japonica. The ancestral range reconstructions from the DEC+j model in BioGeoBEARS are indicated at the internal nodes. The bars and species at the right of the tree were inferred from species delimitation based on K2P distance. B, biogeographical reconstruction of stepping-stone dispersal in M. japonica from the Japanese islands to north-eastern continental China. C, sea-level fluctuations (blue line) modified from Miller et al. (2005). The light blue vertical shading indicates the Miocene marine incursion during a high sea-level period.