Updated 23 Jan. 2024
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Diplomystes Bleeker 1858 diplóos (Gr. διπλόος) or diploū́s (διπλοῦς), twofold or double; mystus, from mýstax (Gr. μύσταξ), moustache, referring to two large barbels on upper lip of Arius papillosus (=D. chilensis); coined as a vernacular name, Diplomyste, by Duméril in 1856
Diplomystes arratiae Muñoz-Ramírez, Colin, Canales-Aguirre, Manosalva, López-Rodríguez, Sukumaran & Górski 2023 in honor of Gloria Arratia, University of Kansas (USA), for her “invaluable” contributions to ichthyology in general and to the family Diplomystidae in particular
Diplomystes camposensis Arratia 1987 -ensis, Latin suffix denoting place, but in this case the name is in honor of Chilean ichthyologist Hugo Campos (1935–1998), who encouraged Arratia to study these catfishes
Diplomystes chilensis (Molina 1782) -ensis, Latin suffix denoting place: Chile, where it is (or was) endemic (may be extinct)
Diplomystes cuyanus Ringuelet 1965 -anus (L.), belonging to: Cuyo, mountainous area of central-west Argentina, presumably where it occurs or is endemic
Diplomystes habitae Muñoz-Ramírez, Colin, Canales-Aguirre, Manosalva, López-Rodríguez, Sukumaran & Górski 2023 in honor of Evelyn Habit, Universidad de Concepcion (Chile), for her “continuous” contributions to the conservation and understanding of Chilean native freshwater fishes
Diplomystes incognitus Arratia & Quezada-Romegialli 2017 Latin for unknown, referring to how the identity of this species was obscured by the assumption that the range of D. chilensis extended south of the Maipo Basin in Chile
Diplomystes mesembrinus Ringuelet 1982 Latin for southern, proposed as a subspecies occurring south of O. viedmensis
Diplomystes nahuelbutaensis Arratia 1987 -ensis, Latin suffix denoting place: Codillera de Nahuelbuta, “an especial geological and ecological region” of the Cordillera de la Costa, Chile, type locality
Diplomystes viedmensis MacDonagh 1931 -ensis, Latin suffix denoting place: Viedma, Río Negro Province, Argentina, near type locality