Key to the Selected Genera of Fusuline
Key to the Selected Genera of Fusuline
复制标题
Fusuline 选定属的关键
DOI：
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发表时间：
1972
期刊：
影响因子：
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通讯作者：
Y. Nogami
中科院分区：
文献类型：
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作者：
Swai Sundharovat;Y. Nogami
属于大型有孔虫的纺锤虫被认为是理想的指标化石。它在石炭纪末至二叠世末极其繁盛，分布广泛，外壳坚硬，适合保存，而且对自然环境似乎非常敏感。其壳层细小，即使在石油勘探的钻井岩心中也能见到，内部结构复杂。定向薄切片的壳允许评估的结构特征，并确定系统发育关系，因为壳保存了所有的个体发育阶段。一个轴向截面穿过初始腔室（前肠）和盘绕轴。矢状切面穿过前房，与弹簧圈轴成直角。这两个部分是必要的。此外，切向截面和横截面是可取的，它们分别与卷曲轴平行和成直角切割，但不穿过前房。1.术语
The fusuline belonging to the so-called larger foraminifera has been regardecl to be the ideal index fossil. It flourished extremely in the late Carboniferous to the late Permian, distributed world-widely, and had a hard shell fit for preservation, In addition, the fusuline seems to have been very sensitive to the physical environments. The fusuline shell is minute enough to be found even in drilling cores for oil prospecting, and has rather cemplicated internal structure. Orientated thin sections of sheli allow to assess the structural features and also te determine the phylogenetic relations, because the shell has preserved all the ontogenetic growth stages. An axial section is passing through the initial chamlrer (proloeulus) and the axis of coiling. A sagittal section is passing threugh the proLoculus and at right angles to the axis of coiling. These two sections are necessary. Furthermore, a tangential section and a cross sectien are desirable, which are cutting parallel and at right angles to the axis of coiling, respectively, but not passing through the proloculus. 1. Terminology