Ecculiomphalus Lower Ordovician, Yichang , Hubei, China Size: 2.5x2cm Ecculiomphalus abendenoni (Frech) Lower Ordovician, Yichang , Hubei, China Size: 2 cm Pararaphistoma qualteriatum aequilterum Ordovician, China Size: 7 cm Bellerophon yuani (Yin) Ordovician, China Size: 7 cm