A new species of Nemoura (Plecoptera: Nemouridae) from Central Italy

摘要

A new species of the genus Nemoura from Central Italy is described: Nemoura sabina sp. n. It belongs to the Nemoura flexuosa-marginata species group and had previously been confused with N. flexuosa. Its relationship to other species is discussed. Thegenus Nemoura Latreille, 1796 belongs to the subfamily Nemourinae and includes more than 100 known species from the Holarctic and Oriental regions (DeWalt et al. 2009). In Europe 58 species are considered valid (Fochetti & Tierno de Figueroa 2004, Muranyi 2007), 17 of them occurring in Italy (Fochetti & Tierno de Figueroa 2009). The flexuosa-marginata species group is characterised by a peculiar shape of cerci, paraprocts, and internal sclerites of the epiproct. This group is partly composed of specieswidely distributed in Europe (N. flexuosa Aubert, 1949, N. marginata Pictet, 1836, N. uncinata Despax, 1934) and several endemic species, 6 of them occurring in Italy: N. hesperiae Consiglio, 1960, N. lucana Nicolai & Fochetti, 1991, N. oropensis Ravizza & Ravizza Dematteis, 1980, N. pesarinii Ravizza & Ravizza Dematteis, 1979, N palliventris Aubert, 1953, and N. rivorum Ravizza & Ravizza Dematteis, 1995 (the latter two species also slightly extend into the French Alps).