Mixobrycon ribeiroi is a species of characin endemic to Paraguay, where it is found in the Paraguay River basin. It is the only member of its genus. Named in honor of Alípio de Miranda Ribeiro (1874-1939) a Brazilian ichthyologist-herpetologist. References Characidae Monotypic fish genera Fish of South America Fish of Paraguay Endemic fauna of Paraguay Taxa named by Carl H. Eigenmann Fish described in 1907