Oligoneuria anomala, Pictet, 1843

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, Revue suisse de Zoologie 127 (2), pp. 315-339 : 330

Oligoneuria anomala F.-J. Pictet, 1843

Oligoneuria anomala Pictet, 1843 -1845: 291-292, pl. 47 figs 1-2.

Oligoneuria (Oligoneuria) anomala . – Salles et al., 2014: 241.

Accepted name: Oligoneuria anomala F.-J. Pictet, 1843.

Locus typicus: “... venant du Brésil ” [Rio de Janeiro district, Brasil].

Type material: NMW; one syntype (♀ subimago); Shtt [= Schott] [blue paper] / Pictet & Hagen vid. [remark: “& Hagen” obviously added later, probably by Hagen] / Oligoneuria anomala Kllr. Pict. Bras [ilien] Rio Janeiro [in Kollar’s handwriting] / Oligoneuria anomala Pict. Type [Ulmer’s handwriting]. Slightly damaged, hind wings crumpled and legs missing . – MHNG; one syntype (female subimago); not traced, probably lost .

Remarks: The original illustrations (F.-J. Pictet, 1845: pl. 46, figs 1-5) have obviously been drawn from the second syntype (femelle subimago, Pictet’s specimen from an unknown locality [presumably Switzerland], “conservé dans alcool”) which belongs to Oligoneuriella rhenana ( Imhoff, 1852) , as already stated by Hagen (1855: 270).

This taxon has been quite enigmatic for a long time although additional descriptions had been provided by Hagen (1855), Ulmer (1921), Needham & Murphy (1924) and Puthz (1973a). Domínguez et al. (2006) recently published supplementary information on the type material. A cladistics analysis by Salles et al. (2014) showed this species to be distinguishable by wing venation, but no other specimens are currently known.