Bos planifrons (flat-fronted cattle) was a bovine species from the Siwaliks of India and Pakistan. It may have been the ancestor of the Indian AurochsBos primigenius namadicus. Its type is a skull.
References
Zong, G. 1984. A record of Bos primigenius from the Quaternary of the Aba Tibetan Autonomous Region. Vertebrata PalAsiatica, Volume XXII No. 3 pp. 239-245. Translated by Will Downs, April 1991. Online pdf (62 kB)