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 Cloe translucida F.-J. Pictet, 1843 Cloe translucida F.-J. Pictet, 1843 -1845: 255-256 , pl. 40, figs 3-4. Baetis luteolus ( Müller, 1776 ) . – Eaton, 1868: 88 (transfer and synonymization). Centroptilum luteolum ( Müller, 1776 ) . – Eaton, 1871: 108 (transfer). Accepted name: Centroptilum luteolum ( Müller, 1776 ) . Locus typicus: “ … sur les bords du lac de Genève … Des exemplaires venant d’Autriche m’ont été communiqués par M. Kollar , et la collection du chanoine Ferrero en renfermait un pris aux environs de Turin” . Type material: Syntypes (male and female imagines), not traced and most probably lost. Remarks: Ulmer (1921: 246) already stated that he could not locate any specimens of Cloe translucida in the NMW collection.