The Bola Batu babirusa (Babyrousa bolabatuensis) is a proposed species of babirusa from the Indonesian island of Sulawesi. It was first described in 1950 as a subspecies of Babyrousa babyrussa, then the only recognized species of babirusa, and raised to species rank by Colin Groves and Erik Meijaard in 2002. At present the Bola Batu babirusa is on...