Yangtzeella Lower Ordovician, Hubei, China Size: 2 x 2cm Yangtzeela poloi Lower Ordovician, Hubei China Size: 2.5cm Pseudomimella meitanensis (Rong et Xu) Ordovician, Yichang, Hubei, China Size: 2cm Pentamerus dossoplanus Lower Silurian, Yichang, Hubei, China Size: 6cm Sinorthis Lower Ordovicium, Guizhou, China Size: 8 x 6cm Pentamerus Lower Silurian, Hubei, China Size: 2 x 2cm Retziella Middle Silurian, Yunnan, China Size: 1 x 1cm