Doan, Tiffany M., Andrew J. Mason, Todd A. Castoe, Mahmood Sasa, and Christopher L. Parkinson. “A Cryptic Palm-Pitviper Species (Squamata: Viperidae: Bothriechis) from the Costa Rican Highlands, With Notes on the Variation Within B. Nigroviridis ”. Zootaxa 4138, no. 2 (July 15, 2016): 271–290. Accessed April 18, 2025. https://mapress.com/zt/article/view/zootaxa.4138.2.3.