||The human-cow divergence is synonymous with the origin of Boreoeutheria. This clade is composed of the clades Euarchontoglires (human) and Laurasiatheria (cow). The oldest members of Euarchontoglires were noted above [see human-mouse split] as the zalambdalestids from Uzbekistan, dated at 90 - 85 Ma (Archibald, Averianov, and Ekdale 2001), although doubt has been expressed about their phylogenetic placement (Asher et al. 2005 Averianov and Archibald 2005). For full discussion and references see link For divergence time between human and horse see Kashtan N et al., 2014, PMID 24763590, Supplementary material p.26 bottom paragraph: "For example the number of amino acid substitutions between [Prochlorococcus clades] cN2-C1 and cN2-C3 Cytochrome C (10% amino acids substitutions) is about the same as the number of Cytochrome C substitutions between human and horse (estimated to have diverged between 100-160 million years ago)."