part of the same species as their wild relatives, the common species are to be named Bos primigenius and Bos gaurus.

During the 2010s, analysis of the complex genetics of the bovine lineages determined that the genus Bison needed to be relegated to a subgenus of Bos in order to retain monophyly within Bos since both extant species of Bison are phylogenetically embedded within Bos. The specific relationships in these analyses determined that the two living bison species were each other's closest living relatives,