The origin of a Mesozoic plant Bennettitales, and extinction

按其外部形态可分为多个属。在东亚，Tetori类型的植物区系和RyosekP型的植物区系中都生长着苯乙酸酯。然而，在这些角质层结构中，已经出现了生长区域环境的影响。在两个植物区系中都没有发现同一物种的生态环境。因此，在建立这两个植物群之前(早侏罗世以前)，应考虑本底植物的起源。现代植物是根据生殖器官的结构进行分类的。虽然在化石植物中也是如此，但不幸的是，化石植物是支离破碎的，所有植物的各部分很少能找到一起。因此，所获得的信息很少，必须从很少的信息中进行判断。因此，人们发现本尼特植物的生殖器官与一些古生代原始种子蕨类植物的生殖器官相似。这表明本尼特植物和种子蕨类植物有共同祖先的可能性。然而，具有本尼特植物和现代植物生殖器官特征的东西尚未发现。早期被子植物出现在欧亚大陆东部的早白垩世。然而，本尼特植物与被子植物之间的直接关系尚不清楚，人们预计，从原始本氏植物中产生的成为被子植物祖先的植物已经产生。

The bennettitales is classified into many genus according to the external form. In the Eastern Asia, bennettilates were grow in both the Tetori-type flora and the RyosekPtype flora. However, in these cuticle structures, the influence of the environments of the growth area has appeared. The bennettitales of the same species are not found from both floras. Therefore, the origin of a bennettitales is considered before establishing the both floras (before Early Jurassic).Modern plants is classified according to the structure of the reproductive organ. Although it is the same also in a fossil plant, though unfortunately, the fossil plant is fragmentary and it is rare that the parts of all plants find together. Therefore, there is Little information acquired and it must be 'judged from few of the information.Consequently, it is find out that bennettitalean reproductive organ is similar to that of some Palaeozoic primitive seed ferns. This has suggested a possibility that bennettitales and seed fern have a common ancestor. However, the thing with the feature of reproductive organ that bennettitales and a modern plant is not found yet.The early angiosperm appeared in the Early Cretaceous in the Eastern Eurasia. However the direct relation between bennettitales and angiosperm is not understood yet, it is expected that the plant which become the ancestor of angiosperm out of primitive bennettitales has been produced.