DOAN, T. M.; MASON, A. J.; CASTOE, T. A.; SASA, M.; PARKINSON, C. L. A cryptic palm-pitviper species (Squamata: Viperidae: <em>Bothriechis</em>) from the Costa Rican highlands, with notes on the variation within B. nigroviridis . Zootaxa, Auckland, New Zealand, v. 4138, n. 2, p. 271–290, 2016. DOI: 10.11646/zootaxa.4138.2.3. Disponível em: https://www.mapress.com/zt/article/view/zootaxa.4138.2.3. Acesso em: 5 dec. 2021.