Di Pietro, D., Alcalde, L. and Williams, J. 2014. New cranial characters in the tribe Hydropsini (Serpentes: Dipsadidae: Xenodontinae). Acta Herpetologica. 9, 1 (Jul. 2014), 1–14. DOI:https://doi.org/10.13128/Acta_Herpetol-12988.