4.3 Article

A new anachoropterid fern from the Asselian (Cisuralian) Wuda Tuff Flora

期刊

出版社

ELSEVIER
DOI: 10.1016/j.revpalbo.2020.104346

关键词

Anachoropterid fern; Hansopieris uncinatus; Anachoropteris clavata-type anatomy; Precocious tendrils and aphlebiae; Climbing habit

资金

  1. Strategic Priority Research Program (B) of Chinese Academy of Sciences [XDB18000000, XDB26000000]
  2. National Natural Science Foundation of China [41802011, 41872013, 41472005, 41530101]
  3. State Key Laboratory of Palaeobiology and Stratigraphy (NIGPAS) [20182114]
  4. Visiting Professorship for Senior International Scientists of Chinese Academy of Sciences [2016vea004]
  5. Grant Agency of the Czech Republic [19-06728S]
  6. Research Programof the Institute of Geology AS CR, Institute of Geology of the Czech Academy of Sciences, v.v.i. [RVO67985831]

向作者/读者索取更多资源

A new anachoropterid fern, Ilansopteris uncinatus gen. et sp. nov., has been identified based on well-preserved vegetative and fertile parts. The plant is suggested to be a vine due to its overall preservation and precocious hooked tendrils and aphlebiae, although the stem remains unknown.
A new anachoropterid fern Ilansopteris uncinatus gen. et sp. nov. collected from the well-known Chinese vegetational Pompeii is recognized on the basis of both vegetative and fertile parts which are excellently preserved as adpressions, a few of which contain carbonized three-dimensional anatomy. Antepenultimate rachises average 3 mm in diameter and are covered by dense scales. Rachis anatomy conforms to the Anachoropteris clavata-type that is characterized by a horseshoe-shaped xylem trace with the lateral arms of its metaxylem being made up of larger tracheids than those in the medial part. Sterile fronds are tripinnately compound. Penultimate and ultimate pinnae are alternately arranged. Pinnules are sphenopterid with dentate margins. Hooked tendrils and aphlebiae are situated laterally and proximal to each penultimate rachis. On juvenile frond specimens, these structures are precocious, growing out before the laminate pinnae. The fertile frond is tripinnate with pinnules that arc identical to their sterile equivalents. Round reproductive organs are about 1 mm in diameter and singly attached to each fertile pinnule. in situ spores are sub-triangular, trilete with labra and assignable to the dispersed miospore genus Leiotriletes (Naumova) Potonie et Kremp. Considering the overall preservation and the precocious hooked tendrils and aphlebiae, the growth habit of IL uncinatus is suggested to be a vine, although its stem is still unknown (C) 2020 Elsevier B.V. All rights reserved.

作者

我是这篇论文的作者
点击您的名字以认领此论文并将其添加到您的个人资料中。

评论

主要评分

4.3
评分不足

次要评分

新颖性
-
重要性
-
科学严谨性
-
评价这篇论文

推荐

暂无数据
暂无数据