This study presents observations on three species of Hannaea and documents and illustrates the life history of H. inaequidentata. We have divided the life history of H. inaequidentata into the following four series of successive stages: auxospore, initial cell, pre-normal vegetative cell, and normal vegetative cell. The initial cell has a cylinder-like and a frequently twisted outline, a longitudinal perizonium wholly covering the valve surface, and a disc-shaped incunabular scale, but lacks any transverse perizonium bands. The pre-normal vegetative cell cannot form ribbon-like colonies, has a wide variety of irregular outlines and is composed of two cell types: one with its epivalve composed of either the initial epivalve or the initial hypovalve, its hypovalve being newly formed, the other with both its epivalve and hypovalve newly formed. The normal vegetative cell has a regular outline and exhibits a significant length reduction so that the largest valve is at least four times longer than the smallest. From initial cell to normal vegetative cell, the developmental sequence goes from ‘chaos to order’ as happens in many phenomena in the universe. The lack of transverse perizonium bands may be the cause of the initial ‘chaos’ process during its developing period from the initial cell to the normal vegetative cell. The development of frustule/valve shape, central area, sternum, virga, vimine, rimoportula and ocellulimbus etc. during the life circle is summarised. In the genus Hannaea, some taxa lack the strongly buttressed central area as in H. inaequidentata, which also has almost parallel valve margins.

中文翻译：

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从混乱到有序：从原始细胞到营养细胞的汉纳亚不等汉根（Lagerstedt）Genkal和Kharitonov（Bacillariophyta）的生活史

这项研究提出了对汉娜的三个物种的观察并记录了文件，并阐明了不平等链球菌的生活史。我们已经将不平等链球菌的生活史分为以下四个连续阶段：芽孢，初始细胞，正常前营养细胞和正常植物细胞。最初的细胞具有圆柱状且经常扭曲的轮廓，整个膜瓣表面均覆盖有纵向的膜周膜，以及盘状的盘状鳞状鳞片，但没有任何横向的膜周膜带。正常前的营养细胞不能形成带状集落，具有各种各样的不规则轮廓，并且由两种细胞类型组成：一种细胞的上瓣由初始上瓣或初始下瓣组成，其下瓣是新形成的，另一种是新近形成的上瓣和下瓣。正常的营养细胞具有规则的轮廓，并且长度明显减少，因此最大的瓣膜比最小的瓣膜长至少四倍。从初始细胞到正常的营养细胞，发育过程从“混乱到有序”，就像宇宙中许多现象一样。在从初始细胞到正常营养细胞的发育过程中，缺乏横周带可能是初始“混乱”过程的原因。总结了生命周期中壳，瓣的形状，中心区域，胸骨，维加，维尼姆，线虫和卵母膜的发育情况。在汉纳亚属中，某些分类单元缺乏与不规则H. inaequidentata一样强固的中心区域，该区域也几乎具有平行的瓣缘。