Paranaella luquei (Monogenea: Microcotylidae), an ectoparasite from the gills of Steindachnerina brevipinna, in the tributaries Corvo and Guairacá, Paranapanema River, Paraná, Brazil

Paranaella luquei is a monogenean from family Microcotylidae, which was found parasitizing the gills of Steindachnerina brevipinna (Eigenmann & Eigenmann, 1889), collected in two different tributaries of Paranapanema River, Paraná, Brazil. This parasite was the first species of Microcotylidae described parasitizing freshwater fishes (Hypostomus sp., Hypostomus regani (Ihering) and Rhinelepis aspera Spix & Agassiz (Loricariidae) in the country.