This article deals with the problem of species independence Carex sordida. Closely related sect. Carex, C. sordida, atherodes, and drymophila, were analyzed based on material from Asian Russia. Based morphological characteristics, it was suggested that sordida is more closely to atherodes than drymophila. Molecular analysis using matK plastid gene ITS2 ETS nuclear ribosomal spacers confirmed a ...

Eriophyoid mites (Acariformes, Eriophyoidea) are microscopic chelicerates morphologically greatly preadapted to endoparasitism on plants. Members of at least six phylogenetically distant eriophyoid genera from two families homoplastically transitioned and acquired the ability penetrate under plant epidermis feed parenchymatous cells, usually causing necrosis. Theoretically, endoparasites expect...