Zujiheja are Nayabaru-domesticated, vaguely gazelle-like ceratopsians. They are used for fleet-footed travel, which makes them fairly rarely encountered, as Nayabaru are not very travel-happy in general, and certainly not without cargo.
(A picture will hopefully follow at some random point in time. In the meantime, you can look at King Kong lore's Bifurcatops, which while far from the same, at least gets a bit closer to the proportions you might expect in Zujiheja.)