Nemoura sahlbergi problematica Zwick, 1973

Zwick, Peter, 2010, New Species And New Records Of Plecoptera From Korea And The Russian Far East, Illiesia 6 (9), pp. 75-97 : 82

Nemoura sahlbergi problematica Zwick, 1973 ; nomen dubium

Nemoura sahlbergi problematica Zwick, 1973a:162 . Holotype ♂, PEOPLE'S REPUBLIC OF KOREA, Prov. Kanwon, Diamond Range , Hotel Go-song (Museum Budapest).

Status of the taxon. At the time of description of the only specimen ever recorded, similarity in the narrow conical epiproct tip suggested conspecificity with N. sahlbergi Morton, 1896 . Because the cerci differed (in particular, the Korean specimen lacked the anteriorly directed dorsal point present in typical N. sahlbergi ) the specimen was described as a subspecies of N. sahlbergi . The latter was never recorded from the Far East and I am now convinced the Korean specimen belonged to some other species.

In the meantime, several new species with epiprocts superficially resembling N. sahlbergi were named from the area. I cannot reliably identify them from the cerci alone.

To decide if N. sahlbergi problematica is identical with one of these recently named species a reexamination of the epiproct is indispensible. Unfortunately, the microscope preparation cannot be found in the museum and appears to be lost. Dr. D. Muranyi was extremely helpful and re-examined and drew the holotype, but the identity of the taxon remains unresolved. N. sahlbergi problematica renders justice to its name: I regard it as a nomen dubium.