Algerina gen. nov. (Bivalvia, Nepiomorphia) from the Silurian of the North Gondwana margin (Algeria), peri-Gondwanan Europe (France, Italy), Perunica (Prague Basin, Bohemia) and the Siberian Plate (Tajmyr Basin, Russia). Bulletin of Geosciences, 83(1) 2008: 79-84. 79 [Zoological Record Volume 144]