异珊瑚隔壁的变异及其分类

自发现具有３个隔壁的异珊瑚新类型之后，对异珊瑚各属之间的隔壁变异关系有了清楚的揭示。按照后生隔壁发育的方式，可分为具内沟的异珊瑚，即由３个隔壁的Ｔｒｉｐｈｙｌｌｉａ，５个隔壁的Ｐｅｎｔａｐｈｙｌｌｉａ，直至多隔壁的Ｆｏｓｓａｐｈｙｌｌｉａ系列和不具内沟的异珊瑚系列，即由４个隔壁的Ｑｕａｄｒａｔｉｐｈｙｌｌｉａ，６个隔壁的Ｈｅｘａｐｈｙｌｌｉｕ，直至多隔壁的Ｈｅｔｅｒｏｐｈｙｌｌｉａ。此外，还可出现具有轴管结构的Ｃｒｅｐｉｄｏｐｈｙｌｌｉｄａｅ及具有特殊外壁结构的Ｌｏｎｇｌｉｎｏｐｈｙｌｌｉｉｄａｅ。对已发现的异珊瑚１９个属作了系统的分类，并将异珊瑚置于珊瑚纲内的一个亚纲，同皱纹珊瑚亚纲相并列的分类单位。

SEPTAL VARIETY AND CLASSEICATION OF HETEROCORALLIA

Since the discoverv of new heterocoral with 3 septa,the septal variety ofthe different genera of heterocorals has been clearly revealed.According to thedevelopmental model of the new septa,the heterocorals can be divided into two types,onewith fossula and the other without fossula. The fossula-bearing type can be developedfrom the genus Triphyllia with 3 septa to the genus Pentaphyllia with 5 septa andfurtherly to the genus Fossaphyllia of multisepta.The non-fossula type can bedeveloped from the genus Quadrdtiphyllia with 4 septa to the genus Hexaphyllia with 6septa and furtherly to the genus Heterophyllia with multisepta. Besides,the familyCrepidophylliidae with the aulos structure and the family Longlinophylliidae with specialwall structure have been found.This paper has suggested a systematic classification of the known 19 genera of theheterocoral,and placed the Heterocorallia as subclass of the Anthozoa which is equivalentto the subclass Rugosa.