Barrantes, E.A.B., Echavarria, M.A.Z., Bartlett, C.R., Helmick, E.E. and Bahder, B.W. 2021. A new species of planthopper in the genus Haplaxius (Hemiptera: Auchenorrhyncha: Fulgoroidea: Cixiidae) from coconut palm (Cocos nucifera) in Costa Rica. Zootaxa. 4963, 3 (Apr. 2021), 412–422. DOI:https://doi.org/10.11646/zootaxa.4963.3.2.