[10] In addition to recognizing Bos and Bison, he assigned the several Asiatic tropical species such as gaur and banteng into the genus Bibos.

[11] Below is the Simpson (1945) taxonomy:[10] Subsequent taxonomic studies resulted Bibos to be reduced to as either a subgenus[12] or a junior synonym of Bos.

[2] As shown below: However recent molecular work on mitochondrial DNA and the Y-chromosome has completely revamped the evolutionary relationships among bovinans.

There is evidence of limited gene flow from Bos primigenius taurus could account for the affiliation between wisent and cattle nuclear genomes (in contrast to mitochondrial ones).

[12] According to the fossil record and molecular studies, Bubalina and Bovina diverged from one and another from a common ancestor around 13.7 million years ago in the Late Miocene.