Leptobos

Leptobos is an extinct genus of large bovines, known from the Late Pliocene and Early Pleistocene of Eurasia, extending from the Iberian Peninsula and Britain to the Indian subcontent and northern China. It is widely posited to be the ancestor of bison.

== Description == thumb|left|Leptobos etruscus lower jaw and silhouetteSpecies of Leptobos weighed on average , and have been described as being medium-sized bovines that had relatively slender limbs. The skulls of Leptobos species are relatively long and narrow and have proportionally elongate molar teeth (though the degree of hypsodonty varies between species) Females lack horn cores. In males, the horn cores vary from being straight to somewhat curved, and generally diverge at an angle between 65° and 80° (with some reaching up to 105°) from each other. In a number of species, the horn cores are curved outward, upwards and forwards.