Syntypes of Corydoras meridionalis Rodolpho von Ihering, 1911, once regarded as lost, were recently found in the collection of fishes of the Museu de Zoologia da USP. The syntypes had been identified as C. ehrhardti Steindachner, 1910, currently considered a senior synonym of that species. Examination of the rediscovered syntypes corroborates the proposed synonymy. Data on the syntypes are presented and compared with information in the original descriptions of C. ehrhardti and C. meridionalis; a few discrepancies found are discussed. A lectotype is designated for C. meridionalis and a photograph of the specimen is provided.
Taxonomy; Catfish; Neotropical freshwater fish
