Worldwide maximum concentration of early branching families. Red cells highlight the worldwide highest concentration (15/26, about 60%) of ‘Archaeangiospermae’ sensu Stuessy (2010). Cells in different tones of green highlight three families (Amborellaceae, Austrobaileyaceae, Degeneriaceae) endemic to New Caledonia, NE Australia, and Fiji, respectively. Zealandia continent (yellow dashed line) is drawn according to Mortimer et al. (2017). The distribution of Archaeangiosperm families was obtained from Angiosperm Phylogeny Website (Stevens 2001 onwards), then georeferenced and superimposed through raster analyses in GIS environment, by means of R software (R Core Team 2017).