Dechenella rossumi

                              Somnium

                                Dechenella rossumi

                            VAN VIERSEN & PRESCHER, 2010

                      Middle Devonian, lower Givetian, Hanonet Formation (upper part)

Taxonomy and biostratigraphy of some proetid trilobites in the Middle Devonian of the Ardennes and Eifel (Rhenohercynian). Bulletin de l'Institut royal des Sciennces naturelles de Belgique, Science de la Terre, 80: 5-45, 11 pls, 8 figs, Brussels, October 31, 2010.