Mayfly types and additional material (Insecta: Ephemeroptera) examined by F. - J. Pictet and A. - E. Pictet, housed in the Museums of Natural History of Geneva and Vienna Author Sartori, Michel Musée cantonal de zoologie, Palais de Rumine, Place Riponne 6, CH- 1005 Lausanne, Suisse. & Département d’Ecologie et d’Evolution, Biophore, Université de Lausanne, CH- 1015 Lausanne, Suisse. Author Bauernfeind, Ernst Naturhistorisches Museum Wien, Burgring 7, A- 1010 Wien, Österreich. E-mail: ernst. bauernfeind @ nhm-wien. ac. at * Corresponding author: michel. sartori @ vd. ch ernst.bauernfeind@nhm-wien.ac.at text Revue suisse de Zoologie 2020 127 2 315 339 journal article 119274 10.35929/RSZ.0022 8839740a-00d8-44ff-b6cf-5cee99c19643 0035-418 5743794 Potamanthus ferreri F. -J. Pictet, 1843 Potamanthus Ferreri F. -J. Pictet, 1843 -1845: 203-204 , pl. 25, fig. 1. Potamanthus luteus ( Linné, 1767 ) . – Bae & McCafferty, 1991: 53 (synonymization). Accepted name: Potamanthus luteus ( Linné, 1767 ) . Locus typicus: “… aux environs de Turin...” [ Italy ]. Type material: Holotype [by monotypy], male imago, not traced. Remarks: Eaton (1884) already noticed that the type was missing in F.-J. Pictet’s collection in 1867. The synonymy proposed by Bae & McCafferty (1991) is consistent with the fact that P. luteus is the only Potamanthus species found throughout Europe.