Nearly complete central element of carapace (head sclerite) of Aegirocassis benmoulai (Van Roy, Daley, & Briggs, 2015). Aegirocassis is extinct genus of giant radiodont arthropod belonging to the family Hurdiidae. This filter-feeding arthropod with length up to 2 metres was the largest animal in Ordovician period. Matrix and fossil are glued. No restoration. Age - Lower Ordovician, Tremadocian, Fezouata Fm. Locality - Morocco, Zagora area Matrix size - 185 x 148 x 27 mm Carapace size - 158 x 45 mm Weight: 523 g If you have bought several items, combined shipping is possible. Please contact me.