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babirusa
The babirusas, also called pig-deer (modern (インドネシア語:babirusa)) are a genus, ''Babyrousa'', in the pig family (Suidae) found in Wallacea, or specifically the Indonesian islands of Sulawesi, Togian, Sula and Buru. All members of this genus were considered part of a single species until 2002, the babirusa, ''B. babyrussa'', but following the split into several species, this scientific name is restricted to the Buru babirusa from Buru and Sula, whereas the best-known species, the north Sulawesi babirusa, is named ''B. celebensis''.〔Meijaard, E., & C. Groves. (2002). ''Proposal for taxonomic changes within the genus Babyrousa.'' Asian Wild Pig News 2 (1), 9-10.〕 If a babirusa does not grind its tusks (achievable through regular activity), they can eventually keep growing so as to penetrate the animal's own skull.〔http://scienceblogs.com/tetrapodzoology/2010/03/08/babirusa-impales-own-head/〕
==Classification==
The genus is monotypic within the subfamily Babyrousinae, or alternatively considered to form a tribe, Babyrousini, of the subfamily Suinae. To date, only one fossil skull has been found to suggest a larger ancestor.〔Ian Metcalfe, ''Faunal and floral migrations and evolution in SE Asia-Australasia''CRC Press, 2001. ISBN 978-90-5809-349-3. 416 pages: pp338.〕
All members of the genus were considered part of a single species until recently, the babirusa or pig-deer, ''B. babyrussa'', but following the split into several species, this scientific name is restricted to the Buru babirusa from Buru and the Sula Islands, whereas the best-known species, the north Sulawesi babirusa, is named ''B. celebensis''.〔 The split, which uses the phylogenetic species concept, is based on differences in size, amount of hair on body and tail-tuft, and measurements of the skull and teeth.〔
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