Studies on skeletal growth of Recent and fossil solitary cleractinian corals

本文根据1090个更新世单生石珊瑚标本，研究了种内形态变异。特别注意的是间隔排列、间隔数目、第三周期间隔的插入方式和帕利的变化。这些标本包含九个：从六分体到十分体的不同间隔平面，其中十分体平面是最常见的。第三周期隔膜的数量和位置有明显的规律性。第三周期不完整的标本也被认为是成熟的形式。帕利的数目和位置与第三周期隔的数目和插入方式密切相关。在极端的情况下，有标本只有两个周期的隔膜和缺乏帕利。化石群中有99种中隔排列的变种，但在收集中发现了57种。本种包括许多不显示两侧对称的标本。

Intraspecific morphological variations have been investigated based on 1090 specimens of a Pleistocene solitary scleractinian coral, Caryophyllia (premocyathus) compressa Yabe and Eguchi. Spcial attention has been paid to variations in septal arrangements, septal numbers, insertion patterns of third-cycle septa, and pali. The specimens contain nine: different septal plans from hexameral to decatetrameral, among which those having a decameral plan are the most common. There is a clear regularity in number and position of the third-cycle septa. Specimens in which the third cycle is incomplete are also considered to be mature forms. Number and position of pali are intimately related to the number and insertion pattern of the third-cycle septa. In extreme cases, there exist specimens having only two cycles of septa and lacking pali. Ninety-nine varieties in septal arrangements are considered to be present in the fossil population, although 57 have been found in the collection. The present species includes many specimens which do not show bilateral symmetry.