I have to say, I didn't expect such systematics would be concluded. No revisions to the genus Capra were made in Ungulate Taxonomy (Groves & Grubb 2011), so it is quite fascinating to see that Capra sibirica sakeen would be elavated to full species level. From a geographic standpoint, I can't say that I am surprised by this as the distribution range of sp. sakeen is quite a distance away from other ssp. of Capra sibirica.
Himalayan Ibex a distinct species - The Hindu
Himalayan Ibex a distinct species - The Hindu