Scholarlink

<p>Although angiosperms occurred earlier, their radiation did not occur until the Middle Cretaceous. Owing to a lack of knowledge of early angiosperms, this radiation used to be mistaken for the origin of angiosperms and became Darwin’s “abominable mystery”. Palaeobotanical progresses in recent decades have released more information on early angiosperms, especially their Middle Cretaceous radiation. The fossil angiosperms from Myanmar amber shed unique light on the evolution and diversity of angiosperms due to their exquisite preservation. To enhance our understanding of this fossil lägerstatte, here we report a new fossil angiosperm named <i>Spinograna myanmarensis</i> gen. et sp. nov. from Myanmar amber. The fossil is a fruit bearing spiny seeds. Its seeds are unique in morphology: they are discoid in form, with marginal furcated spines. This unique morphology represents an extremity in seeds: it is the spiniest seed in plant history, implying that they were dispersed by animals, a fact that remains unknown hitherto. The discovery of <i>Spinograna</i> indicates that the ecosystem in the Middle Cretaceous is much more complicated than previously thought, and some of the ecological ties between plants and animals that existed then have gone out forever.</p>

错误：搜索内容不能为空，请输入英文关键词
错误：关键词超出字数限制，请精简
高级检索

The spiniest seeds found in Mid-Cretaceous Myanmar amber

  • 期刊论文

  • 出版模式：

    开放获取

  • 发表日期：

    2025年11月26日

查看全文
  • Xin Wang,
  • Weijia Huang

摘要

Although angiosperms occurred earlier, their radiation did not occur until the Middle Cretaceous. Owing to a lack of knowledge of early angiosperms, this radiation used to be mistaken for the origin of angiosperms and became Darwin’s “abominable mystery”. Palaeobotanical progresses in recent decades have released more information on early angiosperms, especially their Middle Cretaceous radiation. The fossil angiosperms from Myanmar amber shed unique light on the evolution and diversity of angiosperms due to their exquisite preservation. To enhance our understanding of this fossil lägerstatte, here we report a new fossil angiosperm named Spinograna myanmarensis gen. et sp. nov. from Myanmar amber. The fossil is a fruit bearing spiny seeds. Its seeds are unique in morphology: they are discoid in form, with marginal furcated spines. This unique morphology represents an extremity in seeds: it is the spiniest seed in plant history, implying that they were dispersed by animals, a fact that remains unknown hitherto. The discovery of Spinograna indicates that the ecosystem in the Middle Cretaceous is much more complicated than previously thought, and some of the ecological ties between plants and animals that existed then have gone out forever.