The world's last protoceratopsians

It seems unusal that some of the last ceratopsians are some of the most primitive, but this is indeed the case for the Arastian Montitherids (Mountain beasts), more commonly known as the Bevarkes, which are represented by only 4 extant species across 2 genera, which include:
The Greater bevarke( Montitherium. robustus), the Hungry bevarke (Montitherium. lurcro), the Leaping bevarke (Montitherium. pernix) and the Tunnel bevarke (Aridoperfossor. imrocerus). Almost all the bevarkes, as their taxonomical name suggests, reside in Arastia's mountains, except for the tunnel bevarke, which lives on Arastia's plains, or rather underneath them. All 4 species are omnivorous to some extent, with the tunnel bevarke leaing towards insectivory, the leaping bevarke towards herbivory and the Greater bevarke to carnivory, while the hungry bevarke being the most omnivorous, as it will eat almost anything it comes across. At some places, the range of greater bevarkes, hungry bevarkes and sand wolves (marsupial dogs) have been known to cross, which can result in conflicts between these creatures, with the bevarkes usually coming out on top, but sand wolves are able to store their kills in trees which are mostly inaccesible to bevarkes, due to their poor climbing ability.