异珊瑚隔壁的排布系列

THE ARRANGING SYSTEM OF HETEROCORALL SEPTA

异珊瑚原始隔壁数目、后生隔壁的增生部位和方式以及隔壁的排布系列的研究 ,是探讨异珊瑚的起源、演化和分类的基本前提。通过对 3隔壁的Triphyllia和 4隔壁的Quadratiphyllia二属的研究 ,结合生物体对称的原则 ,提出异珊瑚原始隔壁为 2条 ,并认为异珊瑚的后生隔壁发育在原始隔壁所分隔的左右两侧部体腔内缘部位 ,长隔壁呈树枝状排布或者末端达中心向某一方向扭曲连接形成轴管构造。依据后生隔壁在体腔内的繁生能力、增殖数量、发生部位、排布方式、分化程度、隔壁始端在外壁中的埋植类型和末端在中心部位的连接类型等方面的不同 ,异珊瑚隔壁增生大致可划分为 7个排布系列。

The study of the protosepta number, the yielding position and fashion, the arranging system of Heterocorall septa is basic premise in discussing the origin, evolution and classification of Heterocorall. Through researching the genera Triphyllia and Quadratiphyllia and following the principle of organism symmetry, we put foreword that Heterocorall have 2 protosepta, the postoseta growth beside the protosepta, the long septa arrange in the shape of branch and may twist in a direction forming a fossa. Basing on yielding capacity of septa, the number of postosepta, the yielding position and fashion of septa, the type of septa end within the wall and the connection fashion of septa in center, we suggested that the Heterocorall septa may follow 7 arranging system.