LANGE-BERTALOT, Horst, & Agata Z. WOJTAL 2014 (July) Diversity in species complexes of Placoneis clementis (Grunow) Cox and Paraplaconeis placentula (Ehrenberg) Kulikovskiy, Lange-Bertalot & Metzeltin Beih. Nova Hedwigia 143: 403-420, 82 figs. Placoneis clementispronina, Placoneis nanoclementis, Placoneis parvapolonica, Paraplaconeis cracoviensis |