【摘要】：正Undisputed earliest hitherto known Cornulitid is Cornulites Semiapertus pik, 1930 from the Middle Ordovician Baltica. Early Palaeozoic Cornulitids may have had cosmopolitan distribution, They have often been compared with mollusks and annelids. However they probably were most closely related to tentaculitids, microconchids, brachiopods and bryozoans (Vinn Mutvei, 2005;