New paper out in Palaeontologia Electronica

I am happy to announce that our paper on fossil primate cranial variation is out in the open-access journal Palaeontologia Electronica. The article, titled “Patterns of craniofacial variation and taxonomic diversity in the South African Cercopithecidae fossil record”, uses a sample of 99 fossil primate crania from South Africa, as well as more than 80 extant primates, to investigate the morphological and taxonomic diversity of South African fossil monkeys. The abstract is presented below, and the full pdf is available online.


The rich paleontological record of South Africa is central in our understanding of Plio-Pleistocene mammalian evolution due in large part to the number of crania recovered. Because of the difficulty of chronometric control in many of the cave systems from which these fossils derive, extinct Old World Monkeys (OWMs) are often employed as biochronological markers, making the taxonomic identification of these primate remains particularly relevant to pursuing broader evolutionary questions relating to human evolution and faunal diversity shifts. The taxonomic relationships for the OWM fossils are reconstructed through phylogenetic systematics that rely heavily on craniodental traits. These analytical methods assume that these characters are developmentally, functionally, and genetically independent. This assumption is increasingly being questioned by analyses of extant phenotypic datasets and genetics. We statistically explored cranial variation in South African fossil papionins (n = 99) to determine whether or not extinct taxa reflect the same phenotypic covariance structure as has been reported for extant OWMs. Our results show that many of the cranial measurements are statistically significantly correlated and fail to distinguish between species or even genera of fossil papionins despite distinguishing extant species. Overall, our results suggest that these extinct OWM taxa cannot be discriminated using craniofacial measurements alone, or that the taxonomic designations, as they currently stand, are confounded.

Monson, Tesla A., Brasil, Marianne F., Stratford, Dominic J., and Hlusko, Leslea J. 2017. Patterns of craniofacial variation and taxonomic diversity in the South African Cercopithecidae fossil record. Palaeontologia Electronica 20.1.7A: 1-20

Excited to be featured in the new Cal Koret Visitor Center!

I am very excited and honored to be featured in the new UC Berkeley Koret Visitor Center up at Memorial Stadium! The exhibit features my work, and my outreach with The Graduates radio show on KALX. If you are in Berkeley, head up campus to see the exhibit featuring me, and several other graduate students, including two other scientists from the Department of Integrative Biology. KoretVisitorCenter KoretSelfie

New article out in PNAS

Our new article just came out in the current issue of PNAS!

The integration of quantitative genetics, paleontology, and neontology reveals genetic underpinnings of primate dental evolution

Check it out here:

And be sure and enjoy the Commentary by David Polly, found here:

Other articles commenting on our work can be found below.–cip070816.php