Arsin

Arsins are a family of herbivorous mammals belonging to the order Embrithopoda, which means that they're related to Afrotheres such as elephants, manatees, hyraxes, tenrecs, aardvarks, and kin. Like almost all large land herbivorous mammals, the ancestors of arsins first started out as small tapir-like mammals, but over time, they grew larger and more rhinoceros-like in build and appearance. They are currently indigenous to Africa.

Big-horned arsin
Big-horned arsin (Nearsinotherium africanus) is a species of arsin that is indigenous to most of Africa, except in jungles and the Atlas Mountains. Big-horned arsins normally live in small groups up to about 9 in an area. They are herbivores that mainly feed on grass, leaves, shrubs, roots, tubers, fruits, and vegetables. Unlike rhinos (in most species), the big-horned arsins aren't near-sighted so they could see whatever is dangerous and what isn't to reduce conflicts between sapient species/beings and these animals. They are normally found in many savannas and scrublands of Africa.

Tapir-nosed arsin
Tapir-nosed arsin (Tapirodontomimus athopious) is a species of arsin that is indigenous to most of Africa, except in deserts and the Atlas Mountains. They are named because of the tapir-like noses, something that their ancestors, the Eocene Arsinotheres, and the relative of a tapir-nosed arsin, the big-horned arsin, do not have. They have tapir-like noses to reach into underwater plants more efficiently. They mainly feed on, not just underwater plants, but also grass, leaves, shrubs, fruits, and vegetables.