Di Pietro, D., L. Alcalde, and J. Williams. “New Cranial Characters in the Tribe Hydropsini (Serpentes: Dipsadidae: Xenodontinae)”. Acta Herpetologica, vol. 9, no. 1, July 2014, pp. 1-14, doi:10.13128/Acta_Herpetol-12988.