On the taxonomy of the dityline genera Diasclera Reitter, Dityloidea Fairmaire and Germain and Nerdanus Fairmaire (Coleoptera: Oedemeridae) Author Švihla, Vladimír text Zootaxa 2007 1619 45 51 journal article 10.5281/zenodo.179148 3af5092e-bc0e-4272-8cfc-8a9e0e8e3d32 1175-5326 179148 Diasclera Reitter, 1913 Diasclera Reitter, 1913 : 663 . Type species: Diasclera viridescens Reitter, 1913 , by monotypy. Nacerdasclera Munster, 1921 : 8 [synonymized by Švihla (1986) ]. Type species: Oedemera sibirica Gebler, 1830 , by monotypy. Eumecomera Arnett, 1951 : 297 , syn. nov. Type species: Asclera obscura LeConte, 1854 , original designation. Comments. After the examination of Eumecomera obscura ( LeConte, 1854 ) , the type species of genus Eumecomera Arnett, 1951 , as well as two other species occurring in the Nearctic Region, no differences between this genus and the genus Diasclera Reitter, 1913 from the Palaearctic Region were observed, so a new subjective synonym is proposed here. A diagnosis of Diasclera was given by Švihla (1986) and, following the inclusion of the Nearctic species, no essential characteristics need to be changed, except for the shape of parameres: in fact, the apical teeth can be absent. The genus Diasclera is distributed discontinuously in the Holarctic Region (see below the list of species), with a distribution that parallels that of Nacerdes , subgenus Xanthochroa Schmidt, 1846 . The Nearctic species of Diasclera were revised by Arnett (1951) , and the Palaearctic ones were reviewed and discussed by Švihla (1986 , 1999 ).