X is for Xylotitan
Xylotitan is a new species of brotothere, a hoofed mammal related to horses and rhinos. Brototheres were giant mammals, considered the earliest of the ‘megaherbivores.’
Among brototheres, Xylotitan is among the smallest, only about the size of a large tapir.
This new species was named in 2016 by Mihlbachler and Samuels.