The Early Cretaceous tree fern Acanthopteris (Dicksoniaceae): New insight into fossil records, species diversity, palaeogeography and palaeoclimate

IF 1.9 3区地球科学 Q1 GEOLOGY Cretaceous Research Pub Date : 2024-05-29 DOI:10.1016/j.cretres.2024.105934

Meng Yuan , Yong-Dong Wang , Xu Zhou , Ya Li , Yi-Ming Cui , Li Zhang

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Abstract

Acanthopteris is a fossil fern genus that was established by H.C. Sze in 1931 based on leaf remains from the Lower Cretaceous of the Fuxin Basin in Liaoning Province, China. Traditionally, Acanthopteris is considered to belong to the tree fern family Dicksoniaceae and has been mainly found in the Lower Cretaceous of Fuxin Basin, Huolinhe Basin, and other coeval basins in Northeast China. Since this genus was founded, five fossil species have been described, including A. gothani Sze, A. acutata (Samylina) Zhang, A. alata (Fontaine) Zhang, A. onychioides (Vassilevskaja et Kara-Mursa) Zhang, and A. szei Cao. Based on the investigations on the newly collected fossil specimens and the examinations of other specimens, a reassessment of the systematics and fossil record of Acanthopteris is performed by using both morphological and cluster analysis approaches. The emendation of generic diagnosis of Acanthopteris is provided herein. Geographically, Acanthopteris shows limited distribution in North and NE China, Siberia, Russia and the Inner Zone of Japan. Temporally, Acanthopteris is restricted to the Aptian-Albian period, representing a climate index fossil for a warm and humid climate condition of tropical to subtropical zones during the Early Cretaceous.

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早白垩世树蕨Acanthopteris（Dicksoniaceae）：化石记录、物种多样性、古地理学和古气候的新见解

蕨类化石属（Acanthopteris）是由 H.C. Sze 于 1931 年根据中国辽宁省阜新盆地下白垩统的叶片遗迹建立的。传统上，Acanthopteris 被认为属于树蕨科 Dicksoniaceae，主要分布于中国东北地区的阜新盆地、霍林河盆地和其他共生盆地的下白垩统。自该属建立以来，已描述了 5 个化石种，包括 A. gothani Sze、A. acutata (Samylina) Zhang、A. alata (Fontaine) Zhang、A. onychioides (Vassilevskaja et Kara-Mursa) Zhang 和 A. szei Cao。根据对新采集化石标本的研究和对其他标本的考察，采用形态学和聚类分析方法对Acanthopteris的系统学和化石记录进行了重新评估。本文对 Acanthopteris 的属种诊断进行了修订。从地理分布上看，Acanthopteris 仅分布于华北和东北、西伯利亚、俄罗斯和日本内陆地区。从时间上看，Acanthopteris仅限于安息-阿尔卑斯时期，是早白垩世热带至亚热带温暖湿润气候条件下的气候指数化石。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

Cretaceous Research 地学-地质学

CiteScore

4.10

自引率

19.00%

发文量

235

审稿时长

12 weeks

期刊介绍： Cretaceous Research provides a forum for the rapid publication of research on all aspects of the Cretaceous Period, including its boundaries with the Jurassic and Palaeogene. Authoritative papers reporting detailed investigations of Cretaceous stratigraphy and palaeontology, studies of regional geology, and reviews of recently published books are complemented by short communications of significant new findings. Papers submitted to Cretaceous Research should place the research in a broad context, with emphasis placed towards our better understanding of the Cretaceous, that are therefore of interest to the diverse, international readership of the journal. Full length papers that focus solely on a local theme or area will not be accepted for publication; authors of short communications are encouraged to discuss how their findings are of relevance to the Cretaceous on a broad scale. Research Areas include: • Regional geology • Stratigraphy and palaeontology • Palaeobiology • Palaeobiogeography • Palaeoceanography • Palaeoclimatology • Evolutionary Palaeoecology • Geochronology • Global events.