缅甸地层琥珀动物群显示出与冈瓦纳的联系,并将冈瓦纳种系带到了北半球(鹤形目:Palpimanoidea)。

IF 6.1 1区 生物学 Q1 EVOLUTIONARY BIOLOGY
Hannah M Wood, Jörg Wunderlich
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引用次数: 0

摘要

缅甸琥珀是记录白垩纪中期生物群化石的重要来源。该矿床形成于缅甸地层(Burma Terrane),形成时间约为 99 Ma,缅甸地层脱离冈瓦纳群,后来与亚洲相撞,但时间尚有争议。Palpimanoidea 是一个扩散受限的类群,是中生代蜘蛛动物群的主要组成部分,有大量的化石记录,尤其是来自缅甸琥珀的化石记录。利用形态学和分子数据,研究了生活和化石棕蛛属的进化关系。以化石为顶端的分化年代测定显示,其分化时间与大陆断裂同时发生。我们的研究结果表明,由于早白垩世的历史联系,缅甸琥珀动物群与冈瓦纳大陆有联系,缅甸地层在白垩世将冈瓦纳大陆的世系迁移到南北半球,促进了生物交流。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
Burma Terrane Amber Fauna Shows Connections to Gondwana and Transported Gondwanan Lineages to the Northern Hemisphere (Araneae: Palpimanoidea).

Burmese amber is a significant source of fossils that documents the mid-Cretaceous biota. This deposit was formed around 99 Ma on the Burma Terrane, which broke away from Gondwana and later collided with Asia, although the timing is disputed. Palpimanoidea is a dispersal-limited group that was a dominant element of the Mesozoic spider fauna, and has an extensive fossil record, particularly from Burmese amber. Using morphological and molecular data, evolutionary relationships of living and fossil Palpimanoidea are examined. Divergence dating with fossils as terminal tips shows timing of diversification is contemporaneous with continental breakup.Ancestral range estimations show widespread ancestral ranges that divide into lineages that inherit different Pangean fragments, consistent with vicariance. Our results suggest that the Burmese amber fauna has ties to Gondwana due to a historical connection in the Early Cretaceous, and that the Burma Terrane facilitated biotic exchange by transporting lineages from Gondwana into the Holarctic in the Cretaceous.

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来源期刊
Systematic Biology
Systematic Biology 生物-进化生物学
CiteScore
13.00
自引率
7.70%
发文量
70
审稿时长
6-12 weeks
期刊介绍: Systematic Biology is the bimonthly journal of the Society of Systematic Biologists. Papers for the journal are original contributions to the theory, principles, and methods of systematics as well as phylogeny, evolution, morphology, biogeography, paleontology, genetics, and the classification of all living things. A Points of View section offers a forum for discussion, while book reviews and announcements of general interest are also featured.
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