Gordon, M. L., Colville, J. F., Engelbrecht, A., & Couldridge, V. C. K. (2024). Ancient Grasshoppers: A revision of the genus Bullacris (Orthoptera: Pneumoridae). Zootaxa, 5474(4), 301–354. https://doi.org/10.11646/zootaxa.5474.4.1