Thirteen new riodinid taxa are described: Euselasia azurea sp.n., Euselasia albomaculiga sp.n., Euselasia pseudomys sp.n., Euselasia pance sp.n., Euselasia eberti sp.n., Mesosemia bahia sp.n., Pterographium elegans chocoensis ssp.n., Ematurgina grandis sp.n., Pachythone sumare sp.n., Audre middletoni diamantina ssp.n., Synargis calyce pernambuco n.ssp., Nymphidium trinidadi sp.n., Nymphidium smalli sp.n.. Notes are presented on relationships, habits, habitat and range of each taxon. The foodplant afN. trinidadi in Colombia is Inga coruscans H. & B.
Neotropics; Colombia; Brazil; Peru; Panamá