Fig. 2.

Phylogenetic framework and biogeographic regions employed in this study. a Informal supertree of amniotes used in the analyses. b Triassic palaeogeography, drawn using the ‘paleoMap’ R package⁶³ with additional reference to^{10, 30},with the geographic regions used as localities for the network analysis indicated as follows. (1) Western USA, British Columbia, Mexico, Venezuela; (2) Eastern USA, Eastern Canada, Morocco, Algeria; (3) Europe, Greenland; (4) Russia; (5) China, Thailand, Kyrgyzstan; (6) Argentina; (7) Brazil, Uruguay, Namibia; (8) South Africa, Lesotho, Zimbabwe; (9) Tanzania, Zambia, Madagascar, India, Israel, Saudi Arabia; (10) Antarctica, southeast Australia