The origin of a Mesozoic plant Bennettitales, and extinction

根据其外形可分为许多属。在东亚，贝类既生长在tetori型植物区系中，也生长在ryosekpp型植物区系中。然而，在这些角质层结构中，生长区域环境的影响已经显现出来。在两个植物区系中没有发现同一物种的贝纳特。因此，在确定这两种植物区系之前（早侏罗世之前），应该先考虑一种bennett - tites的起源。现代植物是根据生殖器官的结构来分类的。虽然在植物化石中也是一样的，但不幸的是，植物化石是碎片化的，很少有所有植物的部分被发现在一起。因此，获得的信息很少，必须从很少的信息中进行判断。结果表明，贝尼蒂塔目植物的生殖器官与某些古生代原始种子蕨类植物的生殖器官相似。这表明了一种可能性，即蕨和种子蕨有一个共同的祖先。但是，目前还没有发现具有生殖器官和现代植物特征的东西。早期被子植物出现于欧亚大陆东部早白垩世。但目前尚不清楚被子植物与班纳特属植物之间的直接关系，预计已产生了从原始班纳特属植物演变为被子植物祖先的植物。

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.