A new species Torreya with the seed-bearing structure from the Lower Cretaceous of northwestern China and its evolutionary significance

IF 1.9 3区地球科学 Q1 GEOLOGY

Cretaceous Research Pub Date : 2024-11-21 DOI:10.1016/j.cretres.2024.106056

Aijing Li , Baoxia Du , Jing Zhang , Jing Peng , Yiqiao Fu , Jingjing Cai , Mingyang Wei , Peihong Jin

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引用次数: 0

Abstract

Taxaceae is a special member of the Mesozoic flora mainly found in the Northern Hemisphere. However, Taxaceae fossils did not show abundance in the Mesozoic, particularly lacking twigs with information on reproductive organs. The new species Torreya jiuquanensis sp. nov. from the Lower Cretaceous of the Jiuquan Basin, Gansu, NW China provides valuable insights in seed-bearing structures of Torreya. Firstly, we present a comprehensive morphological description of Torreya jiuquanensis and it is distinguished from analogous fossils by more slender leaves and the obovate ovule. Secondly, phylogenetic analysis was utilized to determine that the position of Torreya jiuquanensis is located in the same clade as Torreya taxifolia. Meanwhile, the remarkable traits of Torreya jiuquanensis indicated that Torreya had demonstrated morphological stasis at least since the Early Cretaceous. Finally, through the examination of other genera within Taxaceae, it proposed that morphological stasis is not only observed in Torreya but also prevalent across nearly all genera of the Taxaceae, which are characterized by an evolutionary hysteresis. Moreover, a reinvestigation of the global fossil records and paleogeographic distribution of Torreya have revealed that Torreya was primarily restricted to the Northern Hemisphere in the Mesozoic, and multiple climate fluctuations were key drivers behind shifts in Torreya diversity and range migration.

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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.