It is noticed that oleanane triterpenoidal saponins are characteristic constituents of this family and have taxonomic significance.
结果表明齐墩果烷型三萜

为木通科
特征化学成分在该科
统分类中具有一定
意义。
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物学篇
物学篇
物趣闻 The taxonomist sometimes overlooks whole species in favour of those groups currently under study, while the ecologist often cotlects only a limited number of specimens of each species, thus reducing their value for taxonomic investigations.
分
学家们有时会忽略整个物种而选择当时正在研究
那些物种群,而生态学家常常只收集每个物种有限
几个样本,因此就降低了分
研究
价值。
物趣闻 One theory holds that, if Rhyniognatha was a flying insect, that would mean that the pterygotes -- the taxonomic group that includes flying insects -- first came about in the early Devonian, say, more than 400 million years ago.
种理论认为, 如果瑞尼格纳塔·赫斯特是
种会飞
昆虫,那就意味着有翅
——
个包括会飞昆虫
分
群——最早出现在早泥盆纪,即超过4亿年前。