Research Engineer CNRS

Main mission

My work consists in organizing fieldworks and associated excavations, notably in southeastern Asia. The research of new localities in the regional sedimentary basins (Thailand, Myanmar, Vietnam and Laos) has a major importance and requires the maintenance of a large network of exchanges and cooperation with the regional earth sciences community.


This implies obtaining the permission of work from the authorities and also from the land and mine owners.

During the field trip, I coordinate the contribution of the different participants to the paleontological surveys to which I contribute actively.

I supervise the work of preparation and casting of the main discoveries, as well as the complete inventory of the recovered fossils.

I organize the work between the different researchers according to their specialties in order to coordinate the studies.

Contribution to research

My work interest concerns the evolutionary history of Primates in southeastern Asia and the contribution of this province in the evolution of anthropoids during the Paleogene, of apes (orangutan lineage), and of the primitive strepsirrhine and tarsiiform primates.


In that context, I direct the French-Thai Paleontological Mission.


Iconic publications

Chaimanee Y, Lazzari V, Chaivanich K, Jaeger JJ – First maxilla of a late Miocene hominid from Thailand and the evolution of pongine derived characters – J Hum Evol. 134:102636. DOI: 10.1016/j.jhevol.2019.06.007.

Jean-Jacques Jaeger, Olivier Chavasseau, Vincent Lazzari, Aung Naing Soe, Chit Sein, Anne Le Maître, Hla Shwe & Yaowalak Chaimanee – New Eocene primate from Myanmar shares dental characters with African Eocene crown anthropoids – Nature Communications volume 10, Article number: 3531 (2019).

Louis de Bonis, Floreal Solé, Yaowalak Chaimanee, Aung Naing Soe, Chit Sein, Vincent Lazzari, Olivier Chavasseau, Jean-jacques Jaeger (2018)– « New hyaenodonta (Mammalia) from the middle Eocene of Myanmar » – C. R. Palevol: doi.org/10.1016/j.crpv.2017.12.003.

Aung Naing Soe, Olivier Chavasseau, Yaowalak Chaimanee, Chit Sein, Jean-Jacques Jaeger, Xavier Valentin & Stéphane Ducrocq – « New remains of Siamotherium pondaungensis (Cetartiodactyla, Hippopotamoidea) from the Eocene of Pondaung, Myanmar: Paleoecologic and phylogenetic implications » – Journal of Vertebrate Paleontology DOI: 10.1080/02724634.2017.1270290.

Chaimanee, Y., Lazzari, V., Benammi, M., Euriat, A. & Jaeger, J.-J. (2015). A new small pliopithecoid primate from the Middle Miocene of Thailand. J. Hum. Evol. 88: 15-24.

Chaimanee, Y., Chavasseau, O., Lazzari, V., Euriat, A., and Jaeger, J.-J. (2013). A new Late Eocene primate from the Krabi Basin (Thailand) and the diversity of Paleogene anthropoids in Southeast Asia. Proc. Roy. Soc. B, 20132268.

Chaimanee, Y. et al. (2012). A new middle Eocene primate from Myanmar and the initial anthropoid colonization of Africa. Proc. Nat. Acad. Sci. USA, 109: 10293-10297.

Chaimanee, Y., Lebrun, R., Yamee, C., and Jaeger, J.-J. (2011). A new middle Miocene tarsier from Thailand and the reconstruction on its orbital morphology using geometric-morphometric method. Proc. Roy. Soc. B, 278: 1956-1963.

Chaimanee, Y., Yamee, C., Tian, P., Chavasseau, O., and Jaeger, J.-J. (2008). First middle Miocene sivaladapid primate from Thailand. J. Hum. Evol. 54: 434-443.

Chaimanee, Y. (2006). Late Pleistocene vertebrate records from Southeast Asia. In Encycopedia of Quaternary, pp. 3189-3197. Elsevier.

Chaimanee, Y. (2004). Siamopithecus eocaenus, anthropoid primate from the Late Eocene of Krabi, Thailand. Anthropoid origins New Visions. C. F. Ross and R. F. Kay. New York, Kluwer Academic/Plenum Publishers. 427: 341-368.

Chaimanee, Y. et al. (2004). A new orang-utan relative from the Late Miocene of Thailand. Nature 427: 439-441.

Chaimanee, Y. et al. (2003). A new middle Miocene hominoid from Thailand and orangutan origins. Nature 422: 61-65.



Tél. : +33 (0)5 49 45 37 53

Guylaine REYNAUD

Tél. : +33 (0)5 49 45 37 26

Fax : +33.(0)5 49 45 40 17


Université de Poitiers – UFR SFA


Bât B35 – TSA 51106

6 rue Michel Brunet

86073 POITIERS Cedex 9