Photograph in life of the adult male holotype of Bothriechis guifarroi (UTA R-60303). 
Photograph by Josiah H. Townsend.
Townsend J, Medina-Flores M, Wilson L, Jadin R, Austin J
CC BY 3.0
<cite style="font-style:normal">Townsend J, Medina-Flores M, Wilson L, Jadin R, Austin J (2013). "<a rel="nofollow" class="external text" href="https://www.pensoft.net/journals/zookeys/article/4834/abstract">A relict lineage and new species of green palm-pitviper (Squamata, Viperidae, Bothriechis) from the Chortís Highlands of Mesoamerica</a>". <i>ZooKeys</i> <b>298</b>: 77--106. Pensoft Publishers. <a href="https://en.wikipedia.org/wiki/Digital_object_identifier" class="extiw" title="w:Digital object identifier">DOI</a>:<a rel="nofollow" class="external text" href="https://doi.org/10.3897/zookeys.298.4834">10.3897/zookeys.298.4834</a>.</cite>