Barrantes, E. A. B.; Echavarria, M. A. Z.; Bartlett, C. R.; Helmick, E. E.; Bahder, B. W. A New Species of Planthopper in the Genus Haplaxius (Hemiptera: Auchenorrhyncha: Fulgoroidea: Cixiidae) from Coconut Palm (Cocos nucifera) in Costa Rica. Zootaxa 2021, 4963, 412–422.