 All three species ate leaves , fruits , and seeds , but the proportions were different . M. pithecoides was primarily a leaf @-@ eater ( folivores ) , but also ate fruit and occasionally seeds . M. globiceps ate a mix of fruits and leaves , as well as a larger quantity of seeds than M. pithecoides . M. dolichobrachion also consumed a mixed diet of fruits and leaves , but analysis of its teeth suggests that it was more of a seed predator than the other two species . 
