# James Mallet Professor of Organismic and Evolutionary Biology in Residence Associate of the Museum of Comparative Zoology ![James Mallet with short grey hair, wearing white shirt and dark jacket, with grass and brick building behind him](/sites/g/files/omnuum6811/files/styles/hwp_4_5__320x400/public/oeb/files/jamesmallet_photobytonyrinaldo.jpeg?itok=5lCBxYle) location\_on Biological Laboratories16 Divinity AvenueCambridge, MA 02138 smartphone [617-496-5350](tel:617-496-5350) email laptop\_windows [Mallet Group](http://mallet.oeb.harvard.edu/) Faculty Support: [Tracy Barbaro](https://www.oeb.harvard.edu/people/tracy-barbaro) We study evolution, hybridization, and speciation - mainly in butterflies. Methods range from collecting trips in dugouts, field experiments in the Amazon rainforest, population genetic inferences about selection and gene flow, and genomics. (*Image courtesy of Tony Rinaldo)* **Recent Publications** Xiong, T., & Mallet, J. (2022). On the impermanence of species: the collapse of genetic incompatibilities in hybridizing populations. *Evolution*, 76 (11), 2498-2512. Mallet, J., & Mullen, S. P. (2022). Reproductive isolation is a heuristic, not a measure: a commentary on Westram et al., 2022. *Journal of Evolutionary Biology*, 35 (9), 1175-1182. Rosser, N., Seixas, F., & Mallet, J. (2022). Sympatric speciation by allochrony? *Molecular Ecology*, 31, 3975-3978. Mallet, J. (2022). The making of a moth man (book review of: Grant, Bruce S. 2021. Observing Evolution). *Evolution*, 76 (6), 1362-1365. Xiong, T., Li, X., Yago, M., & Mallet, J. (2022). Admixture of evolutionary rates across a butterfly hybrid zone. *eLife*, 11, e78135. Rosser, N., Edelman, N. B., Queste, L. M., Nelson, M., Seixas, F., Dasmahapatra, K. K., & Mallet, J. (2022). Complex basis of hybrid female sterility and Haldane’s rule in *Heliconius* butterflies: Z-linkage and epistasis. *Molecular Ecology*, 31, 959-977. Thawornwattana, Y., Seixas, F. A., Yang, Z., & Mallet, J. (2022). Full-likelihood genomic analysis clarifies a complex history of species divergence and introgression: the example of the *erato-sara* group of *Heliconius* butterflies. *Systematic Biology*, 71 (5), 1159-1177 - ## Building [Bio Labs](/building/bio-labs) - ## Lab Group [Mallet Lab Members](/lab-group/mallet-group) - ## People [Faculty](/people/faculty) [Department Faculty](/people/department-faculty) - ## Research Areas [Evolution](/research-areas/evolution) [Biodiversity & Systematics](/research-areas/biodiversity-and-systematics) [Population & Evolutionary Genetics](/research-areas/population-and-evolutionary-genetics) - ## Search by Last Name [M-P](/search-last-name/m-p)