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 Baetis cyanops F.-J. Pictet, 1843 Baetis cyanops F.-J. Pictet, 1843 -1845: 171-172 , pl. 20, fig. 2. Heptagenia elegans ( Curtis, 1834 ) . – Eaton, 1871: 145 (synonymization). Heptagenia sulphurea ( Müller, 1776 ) . – Eaton, 1888: 268 (synonymization). Accepted name: Heptagenia sulphurea ( Müller, 1776 ) . Locus typicus: “… au bord du Rhône ... “ [ Geneva ]. Type material: Syntypes (male imagines?), not traced. Remarks: A well-established synonymy. Heptagenia sulphurea is still present in the Rhone River at Geneva ( Sartori et al., 1989 ).