PhanocerusPhanocerus is a genus of riffle beetles in the family Elmidae. It is primarily Neotropical, with one species reaching the Nearctic realm.SpeciesThese seven species belong to the genus Phanocerus:Phanocerus bugnioni Grouvelle, 1902Phanocerus charopus Spangler, 1966Phanocerus clavicornis Sharp, 1882Phanocerus congener Grouvelle, 1898Phanocerus guaquira Leal-Duarte, Briceño-Santos and Rincon-Ramírez, 2021Phanocerus rufus Maier, 2013Phanocerus sharpi Grouvelle, 1896