Duellman, William E. “The Last One: A New Species of Osteocephalus (Anura: Hylidae) from Colombia, With Comments on the Morphological and Behavioral Diversity Within the Genus”. Phyllomedusa: Journal of Herpetology, vol. 18, no. 2, Dec. 2019, pp. 141-57, https://doi.org/10.11606/issn.2316-9079.v18i2p141-157.