世界人口
This study produced an interesting phylogeny that revealed an initial old world divergence around 112.3 mya, divergence and radiance of new world "Dorstenia" at 67.2 and 30.3 mya respectively, and an old world group nested within the new world that radiated around 13.6 mya. The results of this phylogeny do not determine if vicariance or seed dispersal is the cause behind the old and new world populations of "Dorstenia"; however, it does pose several hypotheses regarding how the new world population came about as well as how three old world "Dorstenia" species are nested in the new world clade of the phylogeny. Due to the small endosperm that is typical of "Dorstenia" seeds, it is unlikely that seed dispersal by animals is the reason for the new world and reemerged old world species. However, it is possible that the new world population emerged by transport over the Beringia, established populations all throughout the North and South Americas, and when climate conditions changed and North America was no longer tropical or subtropical that the North American population died out, leaving only the New World population seen today in South America. This idea also allows for the Old World species nested within the new world by "Dorstenia" populations established in America returning to Africa by Beringia. For this hypothesis to receive more credence, fossil "Dorstenia" plants in North America would be needed.