Corydoras fulleri ( Siluriformes: Callichthyidae ), a new catfish species from the rio Madeira basin, Peru

A new long‐snouted Corydoras species is described from two tributaries of the río Manuripe and a tributary of the río Madre de Dios, rio Madeira basin, Peru. Corydoras fulleri can be distinguished from its congeners by having the following features: (a) branch of the temporal sensory canal at sphenotic, which gives rise to the supraorbital canal, with two pores; (b) upper tooth plate of branchial arch with three series of teeth; (c) area at the corner of the mouth, ventral to the maxillary barbel, with a small fleshy flap; (d) two moderate‐sized dark‐brown or black blotches on caudal‐fin base, one on its lateral portion and another one on its dorsal portion, blotches variably diffuse and/or fused with each other; (e) absence of a dark‐brown or black stripe transversally crossing the orbit; (f) a longitudinal dark‐brown or black stripe on the postdorsal region of flank midline, variably fused with the lateral peduncular blotch, some specimens with slender, longitudinally elongated, dark‐brown or black blotch on flank midline, forming a dash‐like marking, stripe or dash‐like blotch diffuse in some specimens; and (g) region around dorsal‐fin origin generally lacking dark brown or black blotch, or displaying diffuse blotch.