Morphometric, Behavioral, and Genomic Evidence for a New Orangutan Species

Date

2017-11-02

Authors

Nater, Alexander
Mattle-Greminger, Maja P
Nurcahyo, Anton
Nowak, Matthew G
de Manuel, Marc
Desai, Tariq
Groves, Colin
Pybus, Marc
Sonay, Tugce Bilgin
Roos, Christian

Journal Title

Journal ISSN

Volume Title

Publisher

Cell Press

Abstract

Six extant species of non-human great apes are currently recognized: Sumatran and Bornean orangutans, eastern and western gorillas, and chimpanzees and bonobos [1]. However, large gaps remain in our knowledge of fine-scale variation in hominoid morphology, behavior, and genetics, and aspects of great ape taxonomy remain in flux. This is particularly true for orangutans (genus: Pongo), the only Asian great apes and phylogenetically our most distant relatives among extant hominids [1]. Designation of Bornean and Sumatran orangutans, P. pygmaeus (Linnaeus 1760) and P. abelii (Lesson 1827), as distinct species occurred in 2001 [1, 2]. Here, we show that an isolated population from Batang Toru, at the southernmost range limit of extant Sumatran orangutans south of Lake Toba, is distinct from other northern Sumatran and Bornean populations. By comparing cranio-mandibular and dental characters of an orangutan killed in a human-animal conflict to those of 33 adult male orangutans of a similar developmental stage, we found consistent differences between the Batang Toru individual and other extant Ponginae. Our analyses of 37 orangutan genomes provided a second line of evidence. Model-based approaches revealed that the deepest split in the evolutionary history of extant orangutans occurred ∼3.38 mya between the Batang Toru population and those to the north of Lake Toba, whereas both currently recognized species separated much later, about 674 kya. Our combined analyses support a new classification of orangutans into three extant species. The new species, Pongo tapanuliensis, encompasses the Batang Toru population, of which fewer than 800 individuals survive. VIDEO ABSTRACT.

Description

Keywords

pongo tapanuliensis, sundaland, tapanuli orangutan, conservation, gene flow, great apes, morphometrics, phylogeography, population genomics, taxonomy

Citation

Alexander Nater, Maja P. Mattle-Greminger, Anton Nurcahyo, Matthew G. Nowak, Marc de Manuel, Tariq Desai, Colin Groves, Marc Pybus, Tugce Bilgin Sonay, Christian Roos, Adriano R. Lameira, Serge A. Wich, James Askew, Marina Davila-Ross, Gabriella Fredriksson, Guillem de Valles, Ferran Casals, Javier Prado-Martinez, Benoit Goossens, Ernst J. Verschoor, Kristin S. Warren, Ian Singleton, David A. Marques, Joko Pamungkas, Dyah Perwitasari-Farajallah, Puji Rianti, Augustine Tuuga, Ivo G. Gut, Marta Gut, Pablo Orozco-terWengel, Carel P. van Schaik, Jaume Bertranpetit, Maria Anisimova, Aylwyn Scally, Tomas Marques-Bonet, Erik Meijaard, Michael Krützen, Morphometric, Behavioral, and Genomic Evidence for a New Orangutan Species, In Current Biology, Volume 27, Issue 22, 2017, Pages 3487-3498.e10, ISSN 0960-9822, https://doi.org/10.1016/j.cub.2017.09.047. (http://www.sciencedirect.com/science/article/pii/S0960982217312459) Keywords: great apes; taxonomy; Pongo tapanuliensis; Tapanuli orangutan; Sundaland; morphometrics; population genomics; gene flow; phylogeography; conservation, 10.1016/j.cub.2017.09.047

Source

Current biology : CB

Type

Journal article

Book Title

Entity type

Access Statement

License Rights

DOI

10.1016/j.cub.2017.09.047

Restricted until