Piabarchus

{{Short description|Genus of fishes}}

{{Automatic Taxobox | image =

| taxon = Piabarchus

| authority = G. S. Myers, 1928

}}

Piabarchus is a genus of characins from tropical South America.Thomaz, A.T., Arcila, D., Ortí, G. & Malabarba, L.R. (2015): Molecular phylogeny of the subfamily Stevardiinae Gill, 1858 (Characiformes: Characidae): classification and the evolution of reproductive traits. BMC Evolutionary Biology, (2015) 15: 146.