Seed cones of Tsuga (Pinaceae) from the upper Miocene of eastern China: Biogeographic and paleoclimatic implications
Seed cones of Tsuga (Pinaceae) from the upper Miocene of eastern China: Biogeographic and paleoclimatic implications
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中国东部中新世上部的铁杉（松科）种子球果：生物地理和古气候意义
DOI：
10.1016/j.revpalbo.2020.104358
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发表时间：
2021-02-01
影响因子：
1.9
通讯作者：
Sun, Bai-Nian
中科院分区：
文献类型：
--
作者：
Ding, Su-Ting;Wu, Jing-Yu;Sun, Bai-Nian
在浙江省宁海县与天台县交界的晚中新世（Tortonian; 9.2- 10.8Ma）嵊县组沉积物中，发现了6个保存完好的铁杉属球果，具精细的苞鳞复合体。化石球果卵形至椭圆形，鳞片呈倒卵状-圆形排列，具胚珠，苞片楔形-菱形，藏于鳞片后，先端2裂。通过与7 'suga现存球果和化石的详细对比，将现今化石归属于Tsuga cf. dumosa（D.艾希勒。化石锥的发现表明，在中新世晚期，铁杉的分布范围比现在更广。晚中新世以来最冷和最热月份之间的温差增大，迫使铁杉从浙东撤退。(C)2020爱思唯尔B. V.保留所有权利。
Six well-preserved seed cones of Tsuga with fine bract-scale complexes were discovered from the late Miocene (Tortonian; 9.2-10.8 Ma) deposits of the Shengxian Formation at the border of Ninghai and Tiantai County, Zhejiang Province, eastern China. The fossil cones possess ovate to elliptic shape, spirally arranged and obovate-orbicular ovuliferous scales, and cuneate-rhombic bracts hidden behind the scales with 2-lobed apex. Based on detailed comparison with extant and fossil cones of 7'suga, the present fossils are assigned to Tsuga cf. dumosa (D. Don) Eichler. The discovery of the fossil cones indicate that Tsuga had a wider distribution during the late Miocene than at the present. The increase of the difference in temperature between the coldest and warmest months since the late Miocene had forced Tsuga to retreat from eastern Zhejiang. (C) 2020 Elsevier B.V. All rights reserved.