Longiproetus meiopsifius

                              Somnium

                           Longiproetus meiopsifius 

            VAN VIERSEN, VAN ROSSUM & PRESCHER, 2012

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

New data on Astycoryphe, Dohmiella, Longiproetus and Quadratoproetus (Trilobita, Proetidae) from the Middle Devonian in the Ardennes, Belgium

N. Jb. Geol. Paláont. Abh. 264/1, 77-87 Stuttgart, April 2012