Phagor

The Phagor is a race of fictional creatures in Brian Aldiss' Helliconia trilogy.

Also known as the ancipital race, due to their prominent double-edged horns, they are shaggy bipeds, remotely descended from bovine-type stock, and possess thought patterns, customs, and culture inimical and almost incomprehensible to humans. They coexist with humans on the planet Helliconia, subservient during mankind's summer ascendancy and dominating humanity through the centuries-long winter.