Four new species and one new subspecies of the catfish genus Corydoras from Ecuador, Colombia and Brazil (Pisces, Siluriformes, Callichthyidae)

This paper contains figures and descriptions of four new species of Corydoras, C. atropersonatus, C. orphnopterus, from Ecuador, C. simulatus from Colombia, and C. pauciradiatus from Brazil. One new subspecies, Corydoras pastazenisis orcesi from Ecuador is figured and described as new. The relationships of the new species with other species of Corydoras are discussed.