Rhithrogena picteti Det. R. Sowa. This 1971

Rhithrogena picteti Sowa, 1971 Baetis semicolorata. – F.-J. Pictet, 1843 -1845: 208-211, pl. 22, figs 4-7 (nec Baetis semicolorata Curtis, 1834; misidentification). Rhithrogena semitincta. – Kimmins, 1936: 280, fig. 2 (nec Baetis semitincta Pictet, 1843; misidentification). Rhithrogena picteti Sowa, 1971: 903 (original description). Locus typicus: “… la Versoix à Richelien…”. Type material: MHNG; holotype, ♂ imago; bords de la Versoix à Richelien vers 450 m.; 19.V.1968; leg J.C. Régnier. – MHNG; paratypes, 3 ♂ imagines; same data as for holotype. Remarks: Sowa (1971) described this species based on fresh material collected by J.-C. Régnier, a former technician at the MHNG, in the Versoix River, close to Geneva. In the F.-J. Pictet collection at the MHNG there are several pinned specimens which had also been studied by Kimmins (in part; 1936) and by Sowa. However, contrary to what Sowa stated, these specimens do not constitute the “original material” studied by F.-J. Pictet (“… commune dans les ruisseaux des environs de Genève ”). The old MHNG series consists of 12 male imagines labelled: 620 Hindelbank 48 Suisse coll. Pictet / Rh. semicolorata Curtis / Rhithrogena picteti Det. R. Sowa. This locality is not mentioned in the original work of F.-J. Pictet and the material was certainly collected later by Meyer-Dür.Published as part of Sartori, Michel & Bauernfeind, Ernst, 2020, 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, pp. 315-339 in Revue suisse de Zoologie 127 (2) on page 332, DOI: 10.35929/RSZ.0022, http://zenodo.org/record/574379