Julia Arenson

Julia Arenson

Postdoctoral Fellow

I am broadly interested in the evolution of cercopithecoid monkeys, including the
systematics of extant and fossil taxa and their skeletal functional morphology, craniofacial
variation, and biogeography. I received my PhD in Biological Anthropology from the City
University of New York in 2024, advised by Dr. Chris Gilbert. My dissertation undertook a total-
evidence phylogenetic analysis of the fossil and living colobine (leaf-eating) monkeys to explore
the morphological evolution, biogeographic history, and ecological polarity of the subfamily.


I am now a YIBS Postdoctoral Associate working with Dr. Eric Sargis and in collaboration
with the Yale Peabody Museum, focusing on the biodiversity and systematics of rare and
endemic living cercopithecid primates in the Congo Basin. This work is important for accurately
assessing the diversity of these endangered species to help determine conservation priority.

Arenson J.L., Gilbert C.C., Yang D., Ambrose S.H., Manthi F.K., DiMaggio E.N., Hammond A.H. (2026). A systematic revision of the Late Miocene cercopithecid monkeys from the Lemudong’o Formation, Kenya. American Journal of Biological Anthropology 190(3):e70317.
https://doi.org/10.1002/ajpa.70317

Hart J.A., Amboko J., Arenson J.L., Horton E.R., Coates K.F., Kapale J.-P., Koko M.B., Hart T.B., Gilbert C.C., Sargis E.J., Detwiler K.M. (2026). Likweli: A remarkable new species of Colobus monkey from the Lomami National Park, Democratic Republic of Congo. PLOS One 21(7):e0349857.
https://doi.org/10.1371/journal.pone.0349857
https://news.yale.edu/2026/07/15/meet-likweli-new-monkey-species-discovered-congo-basin

Smail I.R., Arenson J.L., Gilbert C.C., Sargis, E.J., Rector A., Reed K.E. (2026). Monkeys from the Pleistocene Markaytoli site at Ledi-Geraru, Afar Region, Ethiopia. American Journal of Biological Anthropology 190(2):e70288.
https://doi.org/10.1002/ajpa.70288

Yang D., Manthi F.K., DiMaggio E.N., Arenson J.L., Ambrose S.H., Souron A., Hammond A.H. (2025). The first occurrence of Cainochoerus (Mammalia, Artiodactyla, Suidae) from the late Miocene Lemudong’o Formation, Kenya. Journal of Vertebrate Paleontology.
https://doi.org/10.1080/02724634.2025.2583028

Arenson J.L. (2025). Phylogenetic analysis of the extant and fossil Colobinae. Journal of Mammalian Evolution 32(4):38.
https://doi.org/10.1007/s10914-025-09778-z

Arenson J.L. (2024). Morphological and molecular systematics of the extant Colobinae Blyth, 1863 (Primates: Cercopithecidae). Zoological Journal of the Linnean Society 202(4): zlae152. https://doi.org/10.1093/zoolinnean/zlae152

Contact Info

julia.arenson@yale.edu

Subfield:

Biological Anthropology