Neotropical Monogenoidea. 53. Gyrodactylus corydori sp. n. and redescription of Gyrodactylus anisopharynx (Gyrodactylidea: Gyrodactylidae), parasites of Corydoras spp. (Siluriformes: Callichthyidae) from southern Brazil. Folia Parasitologica (Ceske Budejovice), 56(1), March 2009: 13-20. 17 [Zoological Record Volume 145]