title: First hominoid from the Late Miocene of the Irrawaddy Formation (Myanmar).
abstract: For over a century, a Neogene fossil mammal fauna has been known in the Irrawaddy Formation in central Myanmar. Unfortunately, the lack of accurately located fossiliferous sites and the absence of hominoid fossils have impeded paleontological studies. Here we describe the first hominoid found in Myanmar together with a Hipparion (s.l.) associated mammal fauna from Irrawaddy Formation deposits dated between 10.4 and 8.8 Ma by biochronology and magnetostratigraphy. This hominoid documents a new species of Khoratpithecus, increasing thereby the Miocene diversity of southern Asian hominoids. The composition of the associated fauna as well as stable isotope data on Hipparion (s.l.) indicate that it inhabited an evergreen forest in a C3-plant environment. Our results enlighten that late Miocene hominoids were more regionally diversified than other large mammals, pointing towards regionally-bounded evolution of the representatives of this group in Southeast Asia. The Irrawaddy Formation, with its extensive outcrops and long temporal range, has a great potential for improving our knowledge of hominoid evolution in Asia.
authors.affiliation: Institut International de Paléoprimatologie et de Paléontologie Humaine, UMR CNRS 6046, Université de Poitiers, Poitiers, France.
authors.forename: Jean-Jacques
authors.initials: JJ
authors.lastname: Jaeger
authors.forename: Aung Naing
authors.initials: AN
authors.lastname: Soe
authors.forename: Olivier
authors.initials: O
authors.lastname: Chavasseau
authors.forename: Pauline
authors.initials: P
authors.lastname: Coster
authors.forename: Edouard-Georges
authors.initials: EG
authors.lastname: Emonet
authors.forename: Franck
authors.initials: F
authors.lastname: Guy
authors.forename: Renaud
authors.initials: R
authors.lastname: Lebrun
authors.forename: Aye
authors.initials: A
authors.lastname: Maung
authors.forename: Aung
authors.initials: A
authors.lastname: Aung Khyaw
authors.forename: Hla
authors.initials: H
authors.lastname: Shwe
authors.forename: Soe
authors.initials: S
authors.lastname: Thura  Tun
authors.forename: Kyaw
authors.initials: K
authors.lastname: Linn Oo
authors.forename: Mana
authors.initials: M
authors.lastname: Rugbumrung
authors.forename: Hervé
authors.initials: H
authors.lastname: Bocherens
authors.forename: Mouloud
authors.initials: M
authors.lastname: Benammi
authors.forename: Kamol
authors.initials: K
authors.lastname: Chaivanich
authors.forename: Paul
authors.initials: P
authors.lastname: Tafforeau
authors.forename: Yaowalak
authors.initials: Y
authors.lastname: Chaimanee
mesh_terms: D000818:Animals; D005075:Biological Evolution; D005580:Fossils; D015186:Hominidae; D002052:Myanmar