During a research on gill ectoparasites of callichthyids fishes from the Peruvian Amazonia, the following monogenoideans were found: Philocorydoras peruensisn. sp. from Corydoras splendens (Castelnau); Philocorydoras multiradiatusn. sp. and Philocorydoras jumboin. sp. from Brochis multiradiatus (Orcés, V.). All new species described herein are mainly differentiated from their congeners based on the morphology of the copulatory complex. In P. peruensisn. sp. the cirrus is “J”-like shaped tube slightly tilted to one side, while in P. jumboin. sp. is “J”-like shaped tube in a straight position and in P. multiradiatusn. sp. the cirrus is an arced tube with inflated base and distally narrow. Brochis (Orcés, V.) represents a new genus hosting species of Philocorydoras. All new species presented in this work represent the first species of Philocorydoras reported for Peru.