Eurycheilichthys pantherinus is a species of armored catfish from the upper and middle Uruguay River basin in Brazil and Argentina. It inhabits shady, fast-flowing, shallow water, ranging from approximately 200–500 metres in elevation. The substratum is predominantly stones, with little or no macrophytes. This species grows to a length of SL. References Azpelicueta, M. & S. Koerber (2014): First record of the hypoptopomatine genus Eurycheilichthys Reis & Schaefer, 1993 (Siluriformes, Loricariidae) from Argentina. Checklist 10 (5): 1210-1212 Otothyrinae Catfish of South America Freshwater fish of Argentina Freshwater fish of Brazil Taxa named by Roberto Esser dos Reis Taxa named by Scott Allen Schaefer Fish described in 1992