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