摘要：The emergence of land plants was a pivotal development in Earth history. It has been postulated that the evolutionary transition from freshwater streptophyte algae to land plants, or the canalization of plant meiosis, was completed during the Middle Ordovician (similar to 460 Ma). However, the absence of undisputed streptophyte algal fossils (for example, Charophyceae) earlier than the late Silurian (similar to 425 Ma) has obscured this link between streptophyte algae and land plants. Here we describe a marine Charophyceae fossil, Tarimochara miraclensis gen. et sp. nov., from early and middle Katian (Late Ordovician, similar to 453-449 Ma) marine limestones in northwestern China. This discovery demonstrates that at least some species of Charophyceae inhabited shallow normal marine environments at that time. Moreover, these early Charophyceae show that some key morphological innovations associated with an evolutionary transition between streptophyte algae and land plants had occurred before the early Katian. This provides crucial evidence relevant to the origins of land plants.

ISSN号：2055-026X

卷、期、页：卷: 11期: 6

发表日期：2025-06-01

期刊分区（SCI为中科院分区）：一区

收录情况：SCI（科学引文索引印刷版）,SCIE（科学引文索引网络版）

发表期刊名称：NATURE PLANTS

参与作者：Liu, Lijing,Han, Jian,Zhang, Zhifei,Tang, Qing,Pang, Ke,Li, Ruiyun,Wu, Yasheng,Hua, Hong,Guo, Bin,Riding, Robert

第一作者：蔡春芳

论文类型：期刊论文

论文概要：Liu, Lijing,Han, Jian,Zhang, Zhifei,Tang, Qing,Pang, Ke,Li, Ruiyun,Wu, Yasheng,Hua, Hong,Guo, Bin,蔡春芳,Riding, Robert，Ordovician marine Charophyceae and insights into land plant derivations，NATURE PLANTS，2025，卷: 11期: 6

论文题目：Ordovician marine Charophyceae and insights into land plant derivations