Jansen, M., Álvarez, L. G., & Köhler, G. (2009). Description of a new species of Xenopholis (Serpentes: Colubridae) from the Cerrado of Bolivia, with comments on Xenopholis scalaris in Bolivia. Zootaxa, 2222(1), 31–45. https://doi.org/10.11646/zootaxa.2222.1.3